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NikosAlexandris

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Posts posted by NikosAlexandris

  1. After switching to kits, the new issue, when actually using biber to compile BibTeX formatted references, is:

    ERROR - Error loading data source package 'Biber::Input::file::biber': Can't locate Biber/Input/file/biber.pm in @INC (you may need to install the Biber::Input::file::biber module) (@INC contains: /etc/perl /usr/local/lib64/perl5/5.24.0/x86_64-linux-thread-multi /usr/local/lib64/perl5/5.24.0 /usr/lib64/perl5/vendor_perl/5.24.0/x86_64-linux-thread-multi /usr/lib64/perl5/vendor_perl/5.24.0 /usr/lib64/perl5/5.24.0/x86_64-linux-thread-multi /usr/lib64/perl5/5.24.0 .) at (eval 126) line 2.

    I ran `perl-cleaner --all` already.

  2. and from my own experience, i have never used stable builds anywhere and there was no really major problems (like disastrous ones), maybe 2-3 only in last 10 years. so, a key is - when you know what to do with stable or unstable - you could expect things to work. if you don't know what to do, likely you'll trap into troubles regardless stable or unstable used. Sometimes updates can be frustrating, i agree. And for newcomers, of course, it's hard as they mostly driven by existing documentation, web, irc -which can be really wrong. The "stable" is what is controlled by matter of letter, in ebuilds, i can put "amd64" instead "~amd64" and it will be considered stable by package manager, which is of course far from real definition of stable. For example, back into not so old case (about 4 monthes), xorg-server-1.19 stabilized by gentoo, due to multiple security vulnerabilities in xorg itself and in it's core parts. xorg-1.19, in turn, found to be very unstable in certain conditions, so the security fixes diminished by the fact you have no working xorg. Those security fixes can be easily, and they are in Funtoo, backported into good known 1.17 version. of course, if 1.19 were ok for the one, he could choose using 1.19. Just trying to describe that stabilization and stable by means of packages, is a volatile term.

     

    Dear Oleg, thank for this commentary. The essence, I see, is to understand what and how to do.  As you put it "when you know what to do with stable or unstable - you could expect things to work. if you don't know what to do, likely you'll trap into troubles regardless stable or unstable used."  This is something that comes in time.

  3. With the on-going change, it's expected that we, users, have several and different, difficulties. And while it is impossible to deal with all at once, I feel that one sticky thread should be there to guide. Or use only github's issues feature.

     

    Myself, have posted in various threads during the last weeks. And contribute, this way, in more noise. Apologies for that.

    Can we have one sticky thread for the Switch?

     

    Thank you

  4. I followed (again) steps at https://github.com/funtoo/meta-repo#using-meta-repo and https://github.com/funtoo/meta-repo#updating-meta-repo.

    Then, I tried to update world via 

    USE="introspection" emerge -auDN @world --exclude=dev-libs/efl --verbose-conflicts
    

    I have, still the perl "issue", see:

    These are the packages that would be merged, in order:
    
    Calculating dependencies... done!
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/perl:0
    
      (dev-lang/perl-5.24.0-r2:0/5.24::perl-kit, ebuild scheduled for merge) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (dev-lang/perl-5.22.2:0/5.22::gentoo, installed) pulled in by
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Crypt-RC4-2.020.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-Perl-MD5-1.900.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-Parser-2.440.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Locale-gettext-1.50.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/OLE-StorageLite-0.190.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Spreadsheet-ParseExcel-0.650.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-stringy-2.111.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/Text-CSV_XS-1.230.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Carp-1.360.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-BaseDir-0.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-MimeInfo-0.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Unicode-Map-0.112.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/URI-1.710.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-DesktopEntry-0.40.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
    x11-misc/xdg-utils:0
    
      (x11-misc/xdg-utils-1.1.1:0/0::gnome-kit, ebuild scheduled for merge) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (x11-misc/xdg-utils-1.1.1-r1:0/0::gentoo, installed) pulled in by
        >=x11-misc/xdg-utils-1.1.1-r1 required by (kde-frameworks/kf-env-4:5/5::gentoo, installed)
        ^^                   ^^^^^^^^
    
    net-libs/gnutls:0
    
      (net-libs/gnutls-3.3.26:0/0::core-kit, ebuild scheduled for merge) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (net-libs/gnutls-3.5.13:0/30::gentoo, installed) pulled in by
        net-libs/gnutls:0/30=[abi_x86_64(-)] required by (net-libs/neon-0.30.2:0/27::gentoo, installed)
                       ^^^^^^
    
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
    
    !!! The following updates are masked by LICENSE changes:
    - app-emulation/virtualbox-bin-5.0.40.115130::nokit (masked by: PUEL license(s))
    A copy of the 'PUEL' license is located at '/var/git/meta-repo/kits/nokit/licenses/PUEL'.
    
    For more information, see the MASKED PACKAGES section in the emerge
    man page or refer to the Gentoo Handbook.
    
    
    emerge: there are no ebuilds built with USE flags to satisfy "~dev-qt/qtcore-4.8.7[aqua=,debug=,glib=,qt3support=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]".
    !!! One of the following packages is required to complete your request:
    - dev-qt/qtcore-4.8.7-r2::dev-kit (Change USE: -qt3support)
    - dev-qt/qtgui-4.8.7::dev-kit (Change USE: +qt3support)
    (dependency required by "dev-qt/qtgui-4.8.7::dev-kit" [ebuild])
    (dependency required by "app-text/poppler-0.45.0::gentoo" [installed])
    (dependency required by "@selected" [set])
    (dependency required by "@world" [argument])

    Trying to use `ego sync` didn't actually work

    ego sync
    Ego module sync does not exist.

    Indeed, I am still running the "old" version

    eix -sI -C app-admin ego
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/arch/x86-64bit of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/arch/x86-64bit/subarch/intel64-haswell of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/flavor/desktop of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediadevice-audio-consumer of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-video-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/audio of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/X of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-gfx-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-gfx-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-audio-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/console-extras of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediadevice-video-consumer of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-video-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-audio-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/media of file /etc/portage/make.profile/parent
    [U] app-admin/ego
         Available versions:  1.1.2^m
         Installed versions:  1.0.1^m[?](12:17:56 AM 10/25/2016)
         Homepage:            http://www.funtoo.org/Package:Ego
         Description:         Funtoo's configuration tool: ego, epro.
    

    I had to update `ego` first

    emerge -av ego
    

    and then it worked

    ego sync
    remote: Counting objects: 3, done.
    remote: Compressing objects: 100% (2/2), done.
    remote: Total 3 (delta 1), reused 3 (delta 1), pack-reused 0
    Unpacking objects: 100% (3/3), done.
    From https://github.com/funtoo/meta-repo
       a02d485..f8a8186  master     -> origin/master
    Fetching submodule kits/core-kit
    From https://github.com/funtoo/core-kit
       8864689..4ca9f8a  1.0-prime  -> origin/1.0-prime
       0ded84d..54348ee  master     -> origin/master
    Fetching submodule kits/desktop-kit
    From https://github.com/funtoo/desktop-kit
       cc16a8b..3311fd6  master     -> origin/master
    Fetching submodule kits/dev-kit
    From https://github.com/funtoo/dev-kit
       2495167e..b2022f19  master     -> origin/master
    Fetching submodule kits/editors-kit
    From https://github.com/funtoo/editors-kit
       ee09e7c..6d900e8  master     -> origin/master
    Fetching submodule kits/games-kit
    From https://github.com/funtoo/games-kit
       44f5588..c76d59e  master     -> origin/master
    Fetching submodule kits/java-kit
    From https://github.com/funtoo/java-kit
       e6f79a5..8babfab  master     -> origin/master
    Fetching submodule kits/kde-kit
    From https://github.com/funtoo/kde-kit
       2fccf76..2aacbd9  master     -> origin/master
    Fetching submodule kits/media-kit
    From https://github.com/funtoo/media-kit
       c8d08ebf..29476820  1.0-prime  -> origin/1.0-prime
       16c0b8d3..13c64661  master     -> origin/master
    Fetching submodule kits/net-kit
    From https://github.com/funtoo/net-kit
       e83b76e1..ede52eab  master     -> origin/master
    Fetching submodule kits/nokit
    From https://github.com/funtoo/nokit
       6a12f3f96..a6d27c073  master     -> origin/master
    Fetching submodule kits/php-kit
    From https://github.com/funtoo/php-kit
       27b0d34..2040f02  master     -> origin/master
    Fetching submodule kits/science-kit
    From https://github.com/funtoo/science-kit
       c9dd757..a0b3f1b  master     -> origin/master
    Fetching submodule kits/text-kit
    From https://github.com/funtoo/text-kit
       4c8a40d..21d6519  master     -> origin/master
    Updating a02d485..f8a8186
    Fast-forward
     kits/core-kit    | 2 +-
     kits/desktop-kit | 2 +-
     kits/dev-kit     | 2 +-
     kits/editors-kit | 2 +-
     kits/games-kit   | 2 +-
     kits/java-kit    | 2 +-
     kits/kde-kit     | 2 +-
     kits/media-kit   | 2 +-
     kits/net-kit     | 2 +-
     kits/nokit       | 2 +-
     kits/php-kit     | 2 +-
     kits/science-kit | 2 +-
     kits/text-kit    | 2 +-
     13 files changed, 13 insertions(+), 13 deletions(-)
    Submodule path 'kits/core-kit': checked out '4ca9f8aeac5c93ca7716820df121154b45ce1f0f'
    Submodule path 'kits/desktop-kit': checked out '3311fd6deaecb245e570d4ad4ca7a93d8e181ea1'
    Submodule path 'kits/dev-kit': checked out 'b2022f19d4451e01981dcaa065891aa0e7ae212e'
    Submodule path 'kits/editors-kit': checked out '6d900e8f6150d2aaa06a661e26f9de3ae12b7880'
    Submodule path 'kits/games-kit': checked out 'c76d59e80869b9ee0570c3d161c6abd3996552b0'
    Submodule path 'kits/java-kit': checked out '8babfab81d4817be00d3a87188d67614ac635193'
    Submodule path 'kits/kde-kit': checked out '2aacbd9b809f126e19b79d509d78315cc3c58a0e'
    Submodule path 'kits/media-kit': checked out '29476820d3ed3882b4600bbaa88a39af901d60bb'
    Submodule path 'kits/net-kit': checked out 'ede52eabdc8557ffa480a12ac5a4b152ea21912c'
    Submodule path 'kits/nokit': checked out 'a6d27c073febcedc190761cc6a749e7a12beebd8'
    Submodule path 'kits/php-kit': checked out '2040f02a8cf03978f70f9bfd1c74406252ea03f9'
    Submodule path 'kits/science-kit': checked out 'a0b3f1baf668fdad21325b9951a4e62aff11dc10'
    Submodule path 'kits/text-kit': checked out '21d65197495b37fc0de77bccbec364f7b5751569'
    

    Now, I noticed I am still in stable! So,

    epro build current
    WARNING: build already set to stable -- typically, user should not change this.
    
    === Enabled Profiles: ===
    
            arch: x86-64bit
           build: current
         subarch: intel64-haswell
          flavor: desktop
         mix-ins: mediadevice-audio-consumer
         mix-ins: mediaformat-video-common
         mix-ins: audio
         mix-ins: X
         mix-ins: mediaformat-gfx-common
         mix-ins: mediaformat-gfx-extra
         mix-ins: mediaformat-audio-common
         mix-ins: console-extras
         mix-ins: mediadevice-video-consumer
         mix-ins: mediaformat-video-extra
         mix-ins: mediaformat-audio-extra
         mix-ins: media
    
    >>> Set build to current.
    WARNING: Upgrading gentoo repository references to core-kit.
    

    and, just to verify "the" sync

    ego sync
    Already up-to-date.
    

    Trying to deal with some single packages, gnutls 3.5.13 is installed, while, after switching and syncing the latest available is only 3.5.11.

    eix -sI gnutls
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediadevice-audio-consumer of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-video-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/audio of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/X of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-gfx-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-gfx-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-audio-common of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/console-extras of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediadevice-video-consumer of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-video-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/mediaformat-audio-extra of file /etc/portage/make.profile/parent
    warning: ignoring parent gentoo:funtoo/1.0/linux-gnu/mix-ins/media of file /etc/portage/make.profile/parent
    [?] net-libs/gnutls
         Available versions:  3.3.26 (~)3.3.27 (~)3.5.10(0/30) (~)3.5.11(0/30) {+crywrap +cxx dane doc examples guile +idn nls openpgp +openssl pkcs11 seccomp sslv2 +sslv3 static-libs test test-full +tls-heartbeat tools valgrind zlib ABI_MIPS="n32 n64 o32" ABI_PPC="32 64" ABI_S390="32 64" ABI_X86="32 64 x32" LINGUAS="cs de en fi fr it ms nl pl sv uk vi zh_CN"}
         Installed versions:  3.5.13(0/30)[?](09:20:25 AM 06/19/2017)(cxx idn nls openssl sslv3 tls-heartbeat zlib -dane -doc -examples -guile -openpgp -pkcs11 -seccomp -sslv2 -static-libs -test -test-full -tools -valgrind ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64" ABI_X86="32 64 -x32" LINGUAS="de en fr -cs -fi -it -ms -nl -pl -sv -uk -vi -zh_CN")
         Homepage:            http://www.gnutls.org/
         Description:         A TLS 1.2 and SSL 3.0 implementation for the GNU project
    

    Anyhow, I will try to deal with these conflicts, one-by-one.  I am just reporting in case this is useful.

  5. I chose "stable" for my main working machine to have less updates to deal with. Then again, I did need to update some stuff to latest versions.  And this brings some extra-maintenance work with it. I am happy to learn about "kits".

     

    Question: how do we migrate to current? Complete re-installation?

  6. I am trying to get biber installed via a local ebuild, where I changed a bit the dependencies. But, it's a large circle of interdependencies. And the wrong way to deal with it.

    I need to get this done, to continue my work.

     

    Is there really no solution to clean up my environment?

    Can I not downgrade to all Perl 5.22 and, even, remove anything that needs Perl 5.24?

     

    I would sacrifice for the moment any other tool and more to get things working in LaTeX.  I use i3wm, so I don't depend on KDE (which I do use some times).

    Thanks for any recommendations.

  7. Thank you dear Oleg, so much, for your time.

     

    I still didn't fix it.  I reached up to...

    cat package.mask
    >=dev-lang/perl-5.24
    =dev-lang/perl-5.24.0-r2
    =dev-perl/Business-ISBN-2.90.200_rc
    =dev-perl/Business-ISBN-Data-20140910.3.0
    =dev-perl/Business-ISMN-1.130.0
    =dev-perl/Business-ISSN-0.910.0-r1
    =dev-perl/Capture-Tiny-0.360.0
    =dev-perl/Class-Accessor-0.340.0-r1
    =dev-perl/Config-AutoConf-0.313.0
    =dev-perl/Data-Uniqid-0.120.0-r1
    =dev-perl/Encode-EUCJPASCII-0.30.0
    =dev-perl/Encode-HanExtra-0.230.0-r1
    =dev-perl/Encode-JIS2K-0.30.0
    =dev-perl/Exporter-Tiny-0.42.0
    =dev-perl/ExtUtils-LibBuilder-0.80.0
    =dev-perl/File-Slurp-9999.190.0-r1
    =dev-perl/File-Slurp-Tiny-0.4.0
    =dev-perl/File-Slurp-Unicode-0.7.1-r1
    =dev-perl/IPC-Run3-0.48.0
    =dev-perl/Lingua-Translit-0.250.0
    =dev-perl/List-AllUtils-0.90.0
    =dev-perl/List-MoreUtils-0.413.0
    =dev-perl/Log-Log4perl-1.460.0
    =dev-perl/Log-Log4perl-1.470.0
    =dev-perl/MIME-Charset-1.9.3
    =dev-perl/Number-Compare-0.30.0-r1
    =dev-perl/Readonly-2.0.0
    =dev-perl/Readonly-XS-1.50.0-r1
    =dev-perl/Sub-Name-0.50.0-r1
    =dev-perl/Text-BibTeX-0.770.0
    =dev-perl/Text-Glob-0.90.0-r1
    =dev-perl/Text-Roman-3.500.0
    =dev-perl/Tie-Cycle-1.221.0
    =dev-perl/Unicode-LineBreak-2016.3.0
    =dev-perl/XML-LibXML-Simple-0.970.0
    =dev-perl/XML-LibXSLT-1.940.0
    =virtual/perl-Digest-1.170.0-r9
    =virtual/perl-Digest-MD5-2.540.0-r2
    =virtual/perl-Digest-SHA-5.950.0-r4
    =virtual/perl-Exporter-5.710.0-r3
    =virtual/perl-Exporter-5.720.0-r2
    =virtual/perl-ExtUtils-Install-2.40.0-r2
    =virtual/perl-ExtUtils-Manifest-1.700.0-r3
    =virtual/perl-File-Path-2.90.0-r4
    =virtual/perl-IPC-Cmd-0.920.0-r5
    =virtual/perl-JSON-PP-2.272.30-r1
    =virtual/perl-JSON-PP-2.273.0-r4
    =virtual/perl-Math-BigInt-1.999.700-r1
    =virtual/perl-MIME-Base64-3.150.0-r2
    =virtual/perl-Sys-Syslog-0.330.0-r6
    =virtual/perl-Test-Simple-1.1.14_p522-r1
    =virtual/perl-Text-ParseWords-3.300.0-r2
    =virtual/perl-Time-Local-1.230.0-r4
    =virtual/perl-Unicode-Collate-1.140.0-r2
    =virtual/perl-Unicode-Normalize-1.250.0-r2
    =dev-perl/Business-ISBN-Data-20140910.2.0
    =dev-perl/Encode-JIS2K-0.02
    =dev-perl/Business-ISBN-2.50.0-r1
    =dev-perl/MIME-Charset-1.12.0
    =dev-perl/XML-LibXSLT-1.950.0
    =virtual/perl-File-Path-2.120.100_rc-r1
    =dev-perl/Log-Log4perl-1.480.0
    =dev-perl/Sub-Name-0.150.0
    =dev-perl/Config-AutoConf-0.311.0
    =dev-perl/ExtUtils-LibBuilder-0.04
    =dev-perl/Readonly-2.10.0
    =dev-perl/Text-BibTeX-0.720.0
    =dev-perl/Text-BibTeX-0.760.0
    

    and then

    emerge -av biber --verbose-conflicts
    
    These are the packages that would be merged, in order:
    
    Calculating dependencies... done!
    [ebuild  N     ] virtual/perl-XSLoader-0.200.0-r2::gentoo  0 KiB
    [ebuild  N     ] dev-perl/Date-Simple-3.30.0-r1::gentoo  23 KiB
    [ebuild  N     ] dev-perl/Data-Dump-1.230.0::gentoo  21 KiB
    [ebuild  N     ] dev-perl/Regexp-Common-2013031301.0.0::gentoo  114 KiB
    [ebuild  N     ] dev-perl/XML-Writer-0.625.0::gentoo  USE="{-test}" 29 KiB
    [ebuild  N    #] dev-perl/Text-Roman-3.500.0::gentoo  18 KiB
    [ebuild  N    #] dev-perl/Business-ISSN-0.910.0-r1::gentoo  USE="{-test}" 5 KiB
    [ebuild  N    #] dev-perl/Sub-Name-0.50.0-r1::gentoo  4 KiB
    [ebuild  N    #] dev-perl/MIME-Charset-1.9.3::gentoo  50 KiB
    [ebuild  N    #] dev-perl/File-Slurp-9999.190.0-r1::gentoo  39 KiB
    [ebuild  N    #] dev-perl/Number-Compare-0.30.0-r1::gentoo  3 KiB
    [ebuild  N     ] perl-core/File-Path-2.90.0::gentoo  21 KiB
    [ebuild  N     ] virtual/perl-Math-BigRat-0.260.800-r1::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-bignum-0.390.0-r2::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-Math-BigInt-FastCalc-0.310.0-r2::gentoo  0 KiB
    [ebuild  N    #] virtual/perl-File-Path-2.90.0-r4::gentoo  0 KiB
    [ebuild  N    #] dev-perl/IPC-Run3-0.48.0::gentoo  USE="{-test}" 20 KiB
    [ebuild  N    #] dev-perl/Lingua-Translit-0.250.0::gentoo  385 KiB
    [ebuild  N    #] dev-perl/Class-Accessor-0.340.0-r1::gentoo  13 KiB
    [ebuild  N    #] dev-perl/Exporter-Tiny-0.42.0::gentoo  USE="{-test}" 32 KiB
    [ebuild  N    #] dev-perl/Tie-Cycle-1.221.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    #] dev-perl/Business-ISBN-Data-20140910.3.0::gentoo  USE="{-test}" 21 KiB
    [ebuild  N     ] perl-core/Math-BigInt-1.999.300::gentoo  211 KiB
    [ebuild  N    #] dev-perl/Business-ISBN-2.90.200_rc::gentoo  USE="-barcode {-test} -xisbn" 354 KiB
    [ebuild  N    #] dev-perl/Business-ISMN-1.130.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    #] dev-perl/Encode-JIS2K-0.30.0::gentoo  410 KiB
    [ebuild  N    #] dev-perl/Encode-HanExtra-0.230.0-r1::gentoo  1,530 KiB
    [ebuild  N    #] dev-perl/Encode-EUCJPASCII-0.30.0::gentoo  129 KiB
    [ebuild  N    #] dev-perl/Unicode-LineBreak-2016.3.0::gentoo  297 KiB
    [ebuild  N    #] dev-perl/Log-Log4perl-1.460.0::gentoo  USE="{-test}" 272 KiB
    [ebuild  N     ] virtual/perl-Math-BigInt-1.999.300-r1::gentoo  0 KiB
    [ebuild  N    #] dev-perl/Data-Uniqid-0.120.0-r1::gentoo  3 KiB
    [ebuild  N    #] dev-perl/XML-LibXSLT-1.940.0::gentoo  112 KiB
    [ebuild     U #] dev-lang/perl-5.24.1_rc4:0/5.24::gentoo [5.22.2:0/5.22::gentoo] USE="berkdb gdbm ithreads
     -debug -doc" 11,302 KiB
    [ebuild  N    #] virtual/perl-IPC-Cmd-0.920.100_rc-r1::gentoo  0 KiB
    [ebuild  N    #] virtual/perl-Unicode-Collate-1.140.0-r2::gentoo  0 KiB
    [ebuild  N    #] virtual/perl-Unicode-Normalize-1.250.0-r2::gentoo  0 KiB
    [ebuild  N    #] dev-perl/List-MoreUtils-0.413.0::gentoo  USE="{-test}" 129 KiB
    [ebuild  N     ] dev-perl/Capture-Tiny-0.300.0::gentoo  USE="{-test}" 34 KiB
    [ebuild  N    #] dev-perl/File-Slurp-Tiny-0.4.0::gentoo  USE="{-test}" 13 KiB
    [ebuild  N    #] dev-perl/Readonly-2.0.0::gentoo  USE="{-test}" 24 KiB
    [ebuild  N    #] dev-perl/Config-AutoConf-0.313.0::gentoo  USE="{-test}" 48 KiB
    [ebuild  N    #] dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo  4 KiB
    [ebuild  N    #] dev-perl/List-AllUtils-0.90.0::gentoo  USE="{-test}" 19 KiB
    [ebuild  N    #] dev-perl/XML-LibXML-Simple-0.970.0::gentoo  USE="{-test}" 23 KiB
    [ebuild  N    #] dev-perl/ExtUtils-LibBuilder-0.80.0::gentoo  USE="{-test}" 6 KiB
    [ebuild  N    #] dev-perl/Text-Glob-0.90.0-r1::gentoo  5 KiB
    [ebuild  N    #] dev-perl/Text-BibTeX-0.770.0::gentoo  289 KiB
    [ebuild  N    #] dev-perl/Readonly-XS-1.50.0-r1::gentoo  9 KiB
    [ebuild  N     ] dev-perl/File-Find-Rule-0.330.0-r1::gentoo  USE="{-test}" 15 KiB
    [ebuild  N     ] dev-perl/Data-Compare-1.250.0::gentoo  USE="{-test}" 26 KiB
    [ebuild  N     ] perl-core/Test-Simple-1.1.14-r1::gentoo  125 KiB
    [ebuild     UD ] virtual/perl-Test-Simple-1.1.14-r3::gentoo [1.1.14_p522-r1::gentoo] 0 KiB
    [blocks b      ] perl-core/Test-Simple ("perl-core/Test-Simple" is blocking virtual/perl-Test-Simple-1.1.1
    4_p522-r1)
    [ebuild  N     ] dev-perl/autovivification-0.160.0::gentoo  49 KiB
    [ebuild  N     ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}" 1,219 KiB
    
    Total: 55 packages (1 upgrade, 1 downgrade, 53 new), Size of downloads: 17,453 KiB
    Conflict: 1 block
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/perl:0
    
      (dev-lang/perl-5.22.2:0/5.22::gentoo, installed) pulled in by
        dev-lang/perl:0/5.22= required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/OLE-StorageLite-0.190.0-r1:0/0::gentoo, install
    ed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (perl-core/Encode-2.730.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/libintl-perl-1.240.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Types-Serialiser-1.0.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/AnyEvent-7.120.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Net-SMTP-SSL-1.30.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-MimeInfo-0.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/LWP-Protocol-https-6.60.0:0/0::gentoo, installe
    d)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Temp-0.230.400-r5:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Date-6.20.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Negotiate-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-SAX-0.990.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/Text-CSV_XS-1.230.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTML-Parser-3.710.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-NamespaceSupport-1.110.0-r1:0/0::gentoo, in
    stalled)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Crypt-RC4-2.020.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-Parser-2.440.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-Simple-2.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTML-Tagset-3.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-MIME-Base64-3.150.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/Module-Build-0.421.600:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-ExtUtils-MakeMaker-7.40.100_rc-r2:0/0::gentoo, instal
    led)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Date-Manip-6.510.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (perl-core/File-Temp-0.230.400-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-XSLoader-0.200.0-r2:0/0::gentoo, ebuild scheduled for
     merge)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-SHA1-2.130.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-Socket-SSL-2.24.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Algorithm-Diff-1.190.300:0/0::gentoo, installed
    )
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/URI-1.710.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-HMAC-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/common-sense-3.740.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-CPAN-Meta-2.150.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/TermReadKey-2.330.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Math-BigInt-FastCalc-0.310.0-r2:0/0::gentoo, ebuild sch
    eduled for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Unicode-EastAsianWidth-1.330.0-r1:0/0::gentoo,
    installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/DBI-1.636.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-DesktopEntry-0.40.0-r1:0/0::gentoo, instal
    led)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-bignum-0.390.0-r2:0/0::gentoo, ebuild scheduled for m
    erge)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/HTTP-Message-6.110.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Net-Daemon-0.480.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/AnyEvent-I3-0.160.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/LWP-MediaTypes-6.20.0-r1:0/0::gentoo, installed
    )
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (net-irc/irssi-1.0.3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/DBD-mysql-4.41.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-vcs/subversion-1.9.5:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Carp-1.360.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Error-0.170.240:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (sys-apps/texinfo-6.1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Encode-Locale-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/Net-HTTP-6.90.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (dev-perl/Net-SSLeay-1.720.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Cookies-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-MakeMaker-7.40.100_rc-r2:0/0::gentoo, install
    ed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/libwww-perl-6.150.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Encode-2.730.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Spreadsheet-ParseExcel-0.650.0:0/0::gentoo, ins
    talled)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Text-Unidecode-1.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-CPAN-Meta-YAML-0.12.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Storable-2.530.100-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (x11-terms/rxvt-unicode-9.21:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Daemon-6.10.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/PlRPC-0.202.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-2.150.1-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/JSON-XS-3.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-vcs/git-2.11.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Math-BigRat-0.260.800-r1:0/0::gentoo, ebuild scheduled
    for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/WWW-RobotRules-6.20.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-LibXML-2.12.100:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-stringy-2.111.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-SAX-Base-1.80.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-Which-1.90.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Authen-SASL-2.160.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-Perl-MD5-1.900.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Storable-2.530.100-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-YAML-0.12.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-HTML-1.1.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-Listing-6.40.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-BaseDir-0.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Unicode-Map-0.112.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Crypt-PasswdMD5-1.400.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Carp-1.360.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
    
      (dev-lang/perl-5.24.1_rc4:0/5.24::gentoo, ebuild scheduled for merge) pulled in by
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24.1* required by (virtual/perl-IPC-Cmd-0.920.100_rc-r1:0/0::gentoo, ebuild scheduled
     for merge)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-MIME-Base64-3.150.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Collate-1.140.0-r2:0/0::gentoo, ebuild schedule
    d for merge)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Normalize-1.250.0-r2:0/0::gentoo, ebuild schedu
    led for merge)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
    
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
    
    The following keyword changes are necessary to proceed:
     (see "package.accept_keywords" in the portage(5) man page for more details)
    # required by virtual/perl-ExtUtils-Manifest-1.700.0-r3::gentoo
    # required by dev-perl/Module-Build-0.421.600::gentoo
    # required by dev-perl/Text-Glob-0.90.0-r1::gentoo
    # required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    # required by dev-perl/Data-Compare-1.250.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    =dev-lang/perl-5.24.1_rc4 ~amd64
    
    The following mask changes are necessary to proceed:
     (see "package.unmask" in the portage(5) man page for more details)
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Readonly-XS-1.50.0-r1
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Business-ISMN-1.130.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Log-Log4perl-1.460.0
    # required by dev-perl/Text-BibTeX-0.770.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Config-AutoConf-0.313.0
    # required by dev-perl/Business-ISMN-1.130.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Tie-Cycle-1.221.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Text-Roman-3.500.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Business-ISBN-2.90.200_rc
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/List-AllUtils-0.90.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Business-ISSN-0.910.0-r1
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/XML-LibXML-Simple-0.970.0
    # required by virtual/perl-ExtUtils-Manifest-1.700.0-r3::gentoo
    # required by dev-perl/Module-Build-0.421.600::gentoo
    # required by dev-perl/Text-Glob-0.90.0-r1::gentoo
    # required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    # required by dev-perl/Data-Compare-1.250.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /usr/portage/profiles/package.mask/funtoo-perl-oleg:
    =dev-lang/perl-5.24.1_rc4
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/List-MoreUtils-0.413.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Encode-EUCJPASCII-0.30.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/XML-LibXSLT-1.940.0
    # required by dev-perl/Unicode-LineBreak-2016.3.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/MIME-Charset-1.9.3
    # required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    # required by dev-perl/Data-Compare-1.250.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Number-Compare-0.30.0-r1
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Lingua-Translit-0.250.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/IPC-Run3-0.48.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Encode-HanExtra-0.230.0-r1
    # required by dev-perl/List-MoreUtils-0.413.0::gentoo
    # required by dev-perl/List-AllUtils-0.90.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Exporter-Tiny-0.42.0
    # required by dev-perl/Text-BibTeX-0.770.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/ExtUtils-LibBuilder-0.80.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Data-Uniqid-0.120.0-r1
    # required by dev-perl/Class-Accessor-0.340.0-r1::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Sub-Name-0.50.0-r1
    # required by dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/File-Slurp-9999.190.0-r1
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Encode-JIS2K-0.30.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Text-BibTeX-0.770.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/File-Slurp-Unicode-0.7.1-r1
    # required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    # required by dev-perl/Data-Compare-1.250.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Text-Glob-0.90.0-r1
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /usr/portage/profiles/package.mask/funtoo-perl-oleg:
    =virtual/perl-IPC-Cmd-0.920.100_rc-r1
    # required by dev-perl/XML-LibXML-Simple-0.970.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/File-Slurp-Tiny-0.4.0
    # required by dev-perl/Log-Log4perl-1.460.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =virtual/perl-File-Path-2.90.0-r4
    # required by dev-perl/Readonly-XS-1.50.0-r1::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Readonly-2.0.0
    # required by dev-perl/Business-ISBN-2.90.200_rc::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Business-ISBN-Data-20140910.3.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Unicode-LineBreak-2016.3.0
    # required by dev-tex/biber-2.5::gentoo
    # required by biber (argument)
    # /etc/portage/package.mask:
    =dev-perl/Class-Accessor-0.340.0-r1
    
    NOTE: The --autounmask-keep-masks option will prevent emerge
          from creating package.unmask or ** keyword changes.
    
    Would you like to add these changes to your config files? [Yes/No]
    
    

    I thought I would manage to get it done.  Looks like I have indeed a messy setup at the moment.

  8. And, now after cleaning Perl related material, the opposite! Upgrade to the latest Perl version.

    emerge -av biber --verbose-conflicts
    
    These are the packages that would be merged, in order:
    
    Calculating dependencies... done!
    [ebuild  N     ] virtual/perl-XSLoader-0.200.0-r2::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-IPC-Cmd-0.920.0-r5::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-File-Path-2.90.0-r4::gentoo  0 KiB
    [ebuild  N     ] dev-perl/Date-Simple-3.30.0-r1::gentoo  23 KiB
    [ebuild  N    ~] dev-perl/Text-Roman-3.500.0::gentoo  18 KiB
    [ebuild  N     ] dev-perl/Data-Dump-1.230.0::gentoo  21 KiB
    [ebuild  N     ] dev-perl/Regexp-Common-2013031301.0.0::gentoo  114 KiB
    [ebuild  N     ] dev-perl/XML-Writer-0.625.0::gentoo  USE="{-test}" 29 KiB
    [ebuild  N    ~] dev-perl/Business-ISSN-0.910.0-r1::gentoo  USE="{-test}" 5 KiB
    [ebuild  N     ] dev-perl/Sub-Name-0.50.0-r1::gentoo  4 KiB
    [ebuild  N     ] dev-perl/MIME-Charset-1.9.3::gentoo  50 KiB
    [ebuild  N     ] dev-perl/File-Slurp-9999.190.0-r1::gentoo  39 KiB
    [ebuild  N     ] dev-perl/Number-Compare-0.30.0-r1::gentoo  3 KiB
    [ebuild  N     ] virtual/perl-Math-BigInt-1.999.700-r1::gentoo  0 KiB
    [ebuild  N     ] dev-perl/IPC-Run3-0.48.0::gentoo  USE="{-test}" 20 KiB
    [ebuild  N     ] dev-perl/Data-Uniqid-0.120.0-r1::gentoo  3 KiB
    [ebuild  N    ~] dev-perl/Lingua-Translit-0.250.0::gentoo  385 KiB
    [ebuild  N     ] dev-perl/Log-Log4perl-1.460.0::gentoo  USE="{-test}" 272 KiB
    [ebuild  N     ] dev-perl/Class-Accessor-0.340.0-r1::gentoo  13 KiB
    [ebuild  N    ~] dev-perl/Business-ISBN-Data-20140910.3.0::gentoo  USE="{-test}" 21 KiB
    [ebuild  N    ~] dev-perl/Tie-Cycle-1.221.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N     ] dev-perl/Exporter-Tiny-0.42.0::gentoo  USE="{-test}" 32 KiB
    [ebuild  N     ] dev-perl/List-MoreUtils-0.413.0::gentoo  USE="{-test}" 129 KiB
    [ebuild  N    ~] dev-perl/Encode-JIS2K-0.30.0::gentoo  410 KiB
    [ebuild  N    ~] dev-perl/Business-ISMN-1.130.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    ~] dev-perl/Business-ISBN-2.90.200_rc::gentoo  USE="-barcode {-test} -xisbn" 354 KiB
    [ebuild  N    ~] dev-perl/Encode-HanExtra-0.230.0-r1::gentoo  1,530 KiB
    [ebuild  N     ] dev-perl/Unicode-LineBreak-2016.3.0::gentoo  297 KiB
    [ebuild  N    ~] dev-perl/Encode-EUCJPASCII-0.30.0::gentoo  129 KiB
    [ebuild  N     ] dev-perl/List-AllUtils-0.90.0::gentoo  USE="{-test}" 19 KiB
    [ebuild  N     ] dev-perl/XML-LibXSLT-1.940.0::gentoo  112 KiB
    [ebuild     U ~] dev-lang/perl-5.24.0-r2:0/5.24::gentoo [5.22.2:0/5.22::gentoo] USE="berkdb gdbm ithreads -debug -doc" 0 KiB
    [ebuild  N    ~] virtual/perl-Unicode-Collate-1.140.0-r2::gentoo  0 KiB
    [ebuild  N    ~] virtual/perl-Unicode-Normalize-1.250.0-r2::gentoo  0 KiB
    [ebuild  N     ] dev-perl/Capture-Tiny-0.360.0::gentoo  USE="{-test}" 36 KiB
    [ebuild  N     ] dev-perl/autovivification-0.160.0::gentoo  49 KiB
    [ebuild  N    ~] dev-perl/File-Slurp-Tiny-0.4.0::gentoo  USE="{-test}" 13 KiB
    [ebuild  N    ~] dev-perl/Config-AutoConf-0.313.0::gentoo  USE="{-test}" 48 KiB
    [ebuild  N    ~] dev-perl/XML-LibXML-Simple-0.970.0::gentoo  USE="{-test}" 23 KiB
    [ebuild  N     ] dev-perl/Readonly-2.0.0::gentoo  USE="{-test}" 24 KiB
    [ebuild  N    ~] dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo  4 KiB
    [ebuild  N    ~] dev-perl/ExtUtils-LibBuilder-0.80.0::gentoo  USE="{-test}" 6 KiB
    [ebuild  N     ] dev-perl/Text-Glob-0.90.0-r1::gentoo  5 KiB
    [ebuild  N    ~] dev-perl/Text-BibTeX-0.770.0::gentoo  289 KiB
    [ebuild  N    ~] dev-perl/Readonly-XS-1.50.0-r1::gentoo  9 KiB
    [ebuild  N     ] dev-perl/File-Find-Rule-0.330.0-r1::gentoo  USE="{-test}" 15 KiB
    [ebuild  N     ] dev-perl/Data-Compare-1.250.0::gentoo  USE="{-test}" 26 KiB
    [ebuild  N     ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}" 1,219 KiB
    
    Total: 48 packages (1 upgrade, 47 new), Size of downloads: 5,799 KiB
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/perl:0
    
      (dev-lang/perl-5.22.2:0/5.22::gentoo, installed) pulled in by
        dev-lang/perl:0/5.22= required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/OLE-StorageLite-0.190.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (perl-core/Encode-2.730.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/libintl-perl-1.240.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Types-Serialiser-1.0.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/AnyEvent-7.120.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Math-BigInt-1.999.700-r1:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Net-SMTP-SSL-1.30.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-MimeInfo-0.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/LWP-Protocol-https-6.60.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Temp-0.230.400-r5:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Date-6.20.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Negotiate-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-SAX-0.990.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/Text-CSV_XS-1.230.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTML-Parser-3.710.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-NamespaceSupport-1.110.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Crypt-RC4-2.020.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-Parser-2.440.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-Simple-2.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTML-Tagset-3.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-MIME-Base64-3.150.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/Module-Build-0.421.600:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-ExtUtils-MakeMaker-7.40.100_rc-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-HTML-1.1.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Date-Manip-6.510.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (perl-core/File-Temp-0.230.400-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-XSLoader-0.200.0-r2:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-SHA1-2.130.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-Socket-SSL-2.24.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Algorithm-Diff-1.190.300:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/URI-1.710.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/common-sense-3.740.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-CPAN-Meta-2.150.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/Net-SSLeay-1.720.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Unicode-EastAsianWidth-1.330.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/DBI-1.636.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-DesktopEntry-0.40.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/HTTP-Message-6.110.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Net-Daemon-0.480.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/AnyEvent-I3-0.160.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/LWP-MediaTypes-6.20.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (net-irc/irssi-1.0.3:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/DBD-mysql-4.41.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Test-Simple-1.1.14_p522-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-vcs/subversion-1.9.5:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Storable-2.530.100-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Error-0.170.240:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (sys-apps/texinfo-6.1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Encode-Locale-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (dev-perl/Net-HTTP-6.90.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/TermReadKey-2.330.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-Listing-6.40.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Cookies-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-MakeMaker-7.40.100_rc-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/libwww-perl-6.150.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Encode-2.730.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Spreadsheet-ParseExcel-0.650.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Text-Unidecode-1.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-CPAN-Meta-YAML-0.12.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-Storable-2.530.100-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22= required by (x11-terms/rxvt-unicode-9.21:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/HTTP-Daemon-6.10.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-IPC-Cmd-0.920.0-r5:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/PlRPC-0.202.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-File-Path-2.90.0-r4:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-2.150.1-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/JSON-XS-3.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-vcs/git-2.11.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/WWW-RobotRules-6.20.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-LibXML-2.12.100:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/IO-stringy-2.111.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/XML-SAX-Base-1.80.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-Which-1.90.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Authen-SASL-2.160.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-Perl-MD5-1.900.0:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Carp-1.360.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-YAML-0.12.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Digest-HMAC-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/File-BaseDir-0.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Unicode-Map-0.112.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22=[-build(-)] required by (dev-perl/Crypt-PasswdMD5-1.400.0:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Carp-1.360.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
      (dev-lang/perl-5.24.0-r2:0/5.24::gentoo, ebuild scheduled for merge) pulled in by
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24.0* required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
        ^              ^^^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-MIME-Base64-3.150.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24.0* required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Test-Simple-1.1.14_p522-r1:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Collate-1.140.0-r2:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
        =dev-lang/perl-5.24.0* required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Normalize-1.250.0-r2:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
        =dev-lang/perl-5.24.0* required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
        ^              ^^^^^^^
        =dev-lang/perl-5.24* required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
  9. Yes, I use stable. And, indeed, at the same time, I have recent versions of various stuff installed.

     

    By the way, like others, me too, I am a (prime) candidate for kits (http://www.funtoo.org/News:New_Ports-2017_tree_and_Kits).

     

    Here the output, after (re-)moving `package.accept_keywords` from being present for portage:

    emerge -pvt dev-tex/biber
    
    [..]
    

    It still wants to downgrade Perl.

     

    Meanwhile, I am re-doing `perl-cleaner --all`. Will re-post if something changes.

  10. Yes, I use stable. And, indeed, at the same time, I have recent versions of various stuff installed.

     

    By the way, like others, me too, I am a (prime) candidate for kits (http://www.funtoo.org/News:New_Ports-2017_tree_and_Kits).

     

    Here the output, after (re-)moving `package.accept_keywords` from being present for portage:

    emerge -pvt dev-tex/biber
    
    These are the packages that would be merged, in reverse order:
    
    Calculating dependencies... done!
    [ebuild  N     ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}" 1,219 KiB
    [ebuild  N    ~]  dev-perl/XML-LibXML-Simple-0.970.0::gentoo  USE="{-test}" 23 KiB
    [ebuild  N     ]  dev-perl/XML-LibXSLT-1.940.0::gentoo  112 KiB
    [ebuild  N     ]  dev-perl/Data-Compare-1.250.0::gentoo  USE="{-test}" 26 KiB
    [ebuild  N     ]   dev-perl/File-Find-Rule-0.330.0-r1::gentoo  USE="{-test}" 15 KiB
    [ebuild  N     ]    dev-perl/Text-Glob-0.90.0-r1::gentoo  5 KiB
    [ebuild  N    ~]  dev-perl/Text-BibTeX-0.770.0::gentoo  289 KiB
    [ebuild  N    ~]   dev-perl/ExtUtils-LibBuilder-0.80.0::gentoo  USE="{-test}" 6 KiB
    [ebuild  N    ~]  dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo  4 KiB
    [ebuild  N    ~]  dev-perl/Readonly-XS-1.50.0-r1::gentoo  9 KiB
    [ebuild  N     ]   dev-perl/Readonly-2.0.0::gentoo  USE="{-test}" 24 KiB
    [ebuild  N    ~]  virtual/perl-Unicode-Normalize-1.250.0-r2::gentoo  0 KiB
    [ebuild  N    ~]  virtual/perl-Unicode-Collate-1.140.0-r2::gentoo  0 KiB
    [ebuild  N     ]  dev-perl/Log-Log4perl-1.460.0::gentoo  USE="{-test}" 272 KiB
    [ebuild  N     ]  dev-perl/List-AllUtils-0.90.0::gentoo  USE="{-test}" 19 KiB
    [ebuild  N     ]   dev-perl/List-MoreUtils-0.413.0::gentoo  USE="{-test}" 129 KiB
    [ebuild  N     ]    virtual/perl-File-Path-2.90.0-r4::gentoo  0 KiB
    [ebuild  N     ]     perl-core/File-Path-2.90.0::gentoo  21 KiB
    [nomerge       ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}"
    [nomerge       ]  dev-perl/Module-Build-0.421.600::gentoo  USE="{-test}"
    [nomerge       ]   virtual/perl-CPAN-Meta-2.150.1-r1::gentoo
    [ebuild  N     ]    perl-core/CPAN-Meta-2.150.1::gentoo  USE="{-test}" 98 KiB
    [ebuild  N     ]     virtual/perl-CPAN-Meta-Requirements-2.132.0-r1::gentoo  0 KiB
    [ebuild  N     ]  dev-perl/Data-Uniqid-0.120.0-r1::gentoo  3 KiB
    [ebuild  N     ]   virtual/perl-Math-BigInt-1.999.700-r1::gentoo  0 KiB
    [ebuild  N     ]  dev-perl/autovivification-0.160.0::gentoo  49 KiB
    [nomerge       ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}"
    [nomerge       ]  dev-perl/List-MoreUtils-0.413.0::gentoo  USE="{-test}"
    [ebuild  N     ]   dev-perl/Exporter-Tiny-0.42.0::gentoo  USE="{-test}" 32 KiB
    [ebuild  N    ~]  dev-perl/Business-ISMN-1.130.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    ~]   dev-perl/Tie-Cycle-1.221.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    ~]  dev-perl/Business-ISBN-2.90.200_rc::gentoo  USE="-barcode {-test} -xisbn" 354 KiB
    [ebuild  N    ~]   dev-perl/Business-ISBN-Data-20140910.3.0::gentoo  USE="{-test}" 21 KiB
    [nomerge       ] dev-perl/XML-LibXML-Simple-0.970.0::gentoo  USE="{-test}"
    [ebuild  N    ~]  dev-perl/File-Slurp-Tiny-0.4.0::gentoo  USE="{-test}" 13 KiB
    [nomerge       ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}"
    [ebuild  N     ]  dev-perl/Unicode-LineBreak-2016.3.0::gentoo  297 KiB
    [ebuild  N    ~]  dev-perl/Encode-EUCJPASCII-0.30.0::gentoo  129 KiB
    [ebuild  N    ~]  dev-perl/Encode-HanExtra-0.230.0-r1::gentoo  1,530 KiB
    [ebuild  N    ~]  dev-perl/Lingua-Translit-0.250.0::gentoo  385 KiB
    [ebuild  N    ~]  dev-perl/Encode-JIS2K-0.30.0::gentoo  410 KiB
    [ebuild  N     ]  dev-perl/IPC-Run3-0.48.0::gentoo  USE="{-test}" 20 KiB
    [ebuild  N     ]  virtual/perl-IPC-Cmd-0.920.0-r5::gentoo  0 KiB
    [nomerge       ] perl-core/CPAN-Meta-2.150.1::gentoo  USE="{-test}"
    [ebuild  N     ]  virtual/perl-CPAN-Meta-YAML-0.12.0-r2::gentoo  0 KiB
    [nomerge       ] dev-perl/autovivification-0.160.0::gentoo
    [ebuild  N     ]  virtual/perl-XSLoader-0.200.0-r2::gentoo  0 KiB
    [nomerge       ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}"
    [ebuild  N    ~]  dev-perl/Config-AutoConf-0.313.0::gentoo  USE="{-test}" 48 KiB
    [ebuild  N     ]   dev-perl/Capture-Tiny-0.360.0::gentoo  USE="{-test}" 36 KiB
    [nomerge       ] app-portage/genlop-0.30.10::gentoo
    [nomerge       ]  dev-perl/Date-Manip-6.510.0::gentoo  USE="{-test}"
    [nomerge       ]   virtual/perl-Encode-2.730.0-r1::gentoo
    [ebuild  N     ]    perl-core/Encode-2.730.0::gentoo  0 KiB
    [ebuild     UD ]     dev-lang/perl-5.22.2:0/5.22::gentoo [5.24.0-r2:0/5.24::gentoo] USE="berkdb gdbm ithre
    ads -debug -doc" 0 KiB
    [nomerge       ] dev-perl/File-Find-Rule-0.330.0-r1::gentoo  USE="{-test}"
    [ebuild  N     ]  dev-perl/Number-Compare-0.30.0-r1::gentoo  3 KiB
    [nomerge       ] dev-perl/Unicode-LineBreak-2016.3.0::gentoo
    [ebuild  N     ]  dev-perl/MIME-Charset-1.9.3::gentoo  50 KiB
    [nomerge       ] dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo
    [ebuild  N     ]  dev-perl/File-Slurp-9999.190.0-r1::gentoo  39 KiB
    [nomerge       ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}"
    [ebuild  N     ]  dev-perl/Class-Accessor-0.340.0-r1::gentoo  13 KiB
    [ebuild  N     ]   dev-perl/Sub-Name-0.50.0-r1::gentoo  4 KiB
    [ebuild  N    ~]  dev-perl/Business-ISSN-0.910.0-r1::gentoo  USE="{-test}" 5 KiB
    [ebuild  N    ~]  dev-perl/Text-Roman-3.500.0::gentoo  18 KiB
    [ebuild  N     ]  dev-perl/XML-Writer-0.625.0::gentoo  USE="{-test}" 29 KiB
    [ebuild  N     ]  dev-perl/Regexp-Common-2013031301.0.0::gentoo  114 KiB
    [ebuild  N     ]  dev-perl/Data-Dump-1.230.0::gentoo  21 KiB
    [ebuild  N     ]  dev-perl/Date-Simple-3.30.0-r1::gentoo  23 KiB
    
    Total: 53 packages (1 downgrade, 52 new), Size of downloads: 5,917 KiB
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/perl:0
    
      (dev-lang/perl-5.24.0-r2:0/5.24::gentoo, installed) pulled in by
        =dev-lang/perl-5.24* required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-Storable-2.560.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        (and 83 more with the same problems)
    
      (dev-lang/perl-5.22.2:0/5.22::gentoo, ebuild scheduled for merge) pulled in by
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        (and 51 more with the same problems)
    
    NOTE: Use the '--verbose-conflicts' option to display parents omitted above
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
    
    The following keyword changes are necessary to proceed:
     (see "package.accept_keywords" in the portage(5) man page for more details)
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Readonly-XS-1.50.0-r1 ~amd64
    # required by dev-perl/Text-BibTeX-0.770.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Config-AutoConf-0.313.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Text-Roman-3.500.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Business-ISBN-2.90.200_rc ~amd64
    # required by dev-perl/Business-ISMN-1.130.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Tie-Cycle-1.221.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/XML-LibXML-Simple-0.970.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =virtual/perl-Unicode-Collate-1.140.0-r2 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Encode-EUCJPASCII-0.30.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Business-ISMN-1.130.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Lingua-Translit-0.250.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Encode-HanExtra-0.230.0-r1 ~amd64
    # required by dev-perl/Text-BibTeX-0.770.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/ExtUtils-LibBuilder-0.80.0 ~amd64
    # required by dev-perl/XML-LibXML-Simple-0.970.0::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/File-Slurp-Tiny-0.4.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Encode-JIS2K-0.30.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Text-BibTeX-0.770.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/File-Slurp-Unicode-0.7.1-r1 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =virtual/perl-Unicode-Normalize-1.250.0-r2 ~amd64
    # required by dev-perl/Business-ISBN-2.90.200_rc::gentoo
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Business-ISBN-Data-20140910.3.0 ~amd64
    # required by dev-tex/biber-2.5::gentoo
    # required by dev-tex/biber (argument)
    =dev-perl/Business-ISSN-0.910.0-r1 ~amd64
    

    It still wants to downgrade Perl.

  11. paste output of:

    grep -rE '(perl|biber)' /etc/portage

    grep -rE '(perl|biber)' /etc/portage
    /etc/portage/backup_package.accept_keywords:# required by sooperlooper (argument)
    /etc/portage/backup_package.accept_keywords:=media-sound/sooperlooper-1.7.3-r1 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Readonly-XS-1.50.0-r1 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Text-BibTeX-0.770.0::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Config-AutoConf-0.313.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Text-Roman-3.500.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Business-ISBN-2.90.200_rc ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Business-ISMN-1.130.0::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Tie-Cycle-1.221.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/XML-LibXML-Simple-0.970.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=virtual/perl-Unicode-Collate-1.140.0-r2 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Encode-EUCJPASCII-0.30.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Business-ISMN-1.130.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Lingua-Translit-0.250.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by virtual/perl-ExtUtils-Manifest-1.700.0-r3::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Module-Build-0.421.600::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Text-Glob-0.90.0-r1::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Data-Compare-1.250.0::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-lang/perl-5.24.0-r2 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Encode-HanExtra-0.230.0-r1 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Text-BibTeX-0.770.0::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/ExtUtils-LibBuilder-0.80.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/XML-LibXML-Simple-0.970.0::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/File-Slurp-Tiny-0.4.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Encode-JIS2K-0.30.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Text-BibTeX-0.770.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/File-Slurp-Unicode-0.7.1-r1 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=virtual/perl-Unicode-Normalize-1.250.0-r2 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-perl/Business-ISBN-2.90.200_rc::gentoo
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Business-ISBN-Data-20140910.3.0 ~amd64
    /etc/portage/backup_package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/backup_package.accept_keywords:# required by biber (argument)
    /etc/portage/backup_package.accept_keywords:=dev-perl/Business-ISSN-0.910.0-r1 ~amd64
    /etc/portage/package.use:# required by dev-vcs/git-2.7.3-r1::gentoo[subversion,perl]
    /etc/portage/package.use:>=dev-vcs/subversion-1.9.4 -dso perl
    /etc/portage/package.use:# required by dev-vcs/git-2.7.3-r1::gentoo[subversion,perl]
    /etc/portage/package.use:# required by dev-vcs/git-2.7.3-r1::gentoo[subversion,perl]
    /etc/portage/package.accept_keywords:# required by sooperlooper (argument)
    /etc/portage/package.accept_keywords:=media-sound/sooperlooper-1.7.3-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Readonly-XS-1.50.0-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-perl/Text-BibTeX-0.770.0::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Config-AutoConf-0.313.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Text-Roman-3.500.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Business-ISBN-2.90.200_rc ~amd64
    /etc/portage/package.accept_keywords:# required by dev-perl/Business-ISMN-1.130.0::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Tie-Cycle-1.221.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/XML-LibXML-Simple-0.970.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=virtual/perl-Unicode-Collate-1.140.0-r2 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Encode-EUCJPASCII-0.30.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Business-ISMN-1.130.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Lingua-Translit-0.250.0 ~amd64
    /etc/portage/package.accept_keywords:# required by virtual/perl-ExtUtils-Manifest-1.700.0-r3::gentoo
    /etc/portage/package.accept_keywords:# required by dev-perl/Module-Build-0.421.600::gentoo
    /etc/portage/package.accept_keywords:# required by dev-perl/Text-Glob-0.90.0-r1::gentoo
    /etc/portage/package.accept_keywords:# required by dev-perl/File-Find-Rule-0.330.0-r1::gentoo
    /etc/portage/package.accept_keywords:# required by dev-perl/Data-Compare-1.250.0::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-lang/perl-5.24.0-r2 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Encode-HanExtra-0.230.0-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-perl/Text-BibTeX-0.770.0::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/ExtUtils-LibBuilder-0.80.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-perl/XML-LibXML-Simple-0.970.0::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/File-Slurp-Tiny-0.4.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Encode-JIS2K-0.30.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Text-BibTeX-0.770.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/File-Slurp-Unicode-0.7.1-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=virtual/perl-Unicode-Normalize-1.250.0-r2 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-perl/Business-ISBN-2.90.200_rc::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Business-ISBN-Data-20140910.3.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.5::gentoo
    /etc/portage/package.accept_keywords:# required by biber (argument)
    /etc/portage/package.accept_keywords:=dev-perl/Business-ISSN-0.910.0-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by =dev-tex/biber-2.7 (argument)
    /etc/portage/package.accept_keywords:=dev-tex/biber-2.7 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.7::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biblatex-3.7-r1::gentoo[biber]
    /etc/portage/package.accept_keywords:=dev-perl/DateTime-Calendar-Julian-0.40.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.7::gentoo
    /etc/portage/package.accept_keywords:# required by dev-tex/biblatex-3.7-r1::gentoo[biber]
    /etc/portage/package.accept_keywords:=dev-perl/Sort-Key-1.330.0 ~amd64
    /etc/portage/package.accept_keywords:# required by dev-tex/biber-2.7::gentoo
    /etc/portage/package.accept_keywords:# required by =dev-tex/biber-2.7 (argument)
    /etc/portage/package.accept_keywords:# required by =virtual/perl-Carp-1.400.0-r1 (argument)
    /etc/portage/package.accept_keywords:=virtual/perl-Carp-1.400.0-r1 ~amd64
    /etc/portage/package.accept_keywords:# required by =virtual/perl-Storable-2.560.0-r2 (argument)
    /etc/portage/package.accept_keywords:=virtual/perl-Storable-2.560.0-r2 ~amd64
    /etc/portage/package.accept_keywords:# required by =virtual/perl-ExtUtils-MakeMaker-7.100.100_rc-r2 (argument)
    /etc/portage/package.accept_keywords:=virtual/perl-ExtUtils-MakeMaker-7.100.100_rc-r2 ~amd64
    
    
  12. First,

    eix-sync
    

    Then, I am trying to emerge `biber`. It is required, along `biblatex` for compiling bibliographies for LaTeX documents.

    emerge -av biber
    These are the packages that would be merged, in order:
    Calculating dependencies... done!
    [ebuild  N     ] dev-perl/Date-Simple-3.30.0-r1::gentoo  23 KiB
    [ebuild  N    ~] dev-perl/Text-Roman-3.500.0::gentoo  18 KiB
    [ebuild  N     ] dev-perl/Data-Dump-1.230.0::gentoo  21 KiB
    [ebuild  N     ] dev-perl/Regexp-Common-2013031301.0.0::gentoo  114 KiB
    [ebuild  N     ] dev-perl/XML-Writer-0.625.0::gentoo  USE="{-test}" 29 KiB
    [ebuild  N    ~] dev-perl/Business-ISSN-0.910.0-r1::gentoo  USE="{-test}" 5 KiB
    [ebuild  N     ] dev-perl/Sub-Name-0.50.0-r1::gentoo  4 KiB
    [ebuild  N     ] dev-perl/File-Slurp-9999.190.0-r1::gentoo  39 KiB
    [ebuild  N     ] dev-perl/MIME-Charset-1.9.3::gentoo  50 KiB
    [ebuild  N     ] dev-perl/Number-Compare-0.30.0-r1::gentoo  3 KiB
    [ebuild  N     ] dev-perl/Class-Accessor-0.340.0-r1::gentoo  13 KiB
    [ebuild     UD ] dev-lang/perl-5.22.2:0/5.22::gentoo [5.24.0-r2:0/5.24::gentoo] USE="berkdb gdbm ithreads
    -debug -doc" 0 KiB
    [ebuild  N     ] perl-core/Encode-2.730.0::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-XSLoader-0.200.0-r2::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-CPAN-Meta-YAML-0.12.0-r2::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-IPC-Cmd-0.920.0-r5::gentoo  0 KiB
    [ebuild  N     ] virtual/perl-CPAN-Meta-Requirements-2.132.0-r1::gentoo  0 KiB
    [ebuild  N     ] perl-core/File-Path-2.90.0::gentoo  21 KiB
    [ebuild  N     ] virtual/perl-Math-BigInt-1.999.700-r1::gentoo  0 KiB
    [ebuild  N    ~] virtual/perl-Unicode-Collate-1.140.0-r2::gentoo  0 KiB
    [ebuild  N    ~] virtual/perl-Unicode-Normalize-1.250.0-r2::gentoo  0 KiB
    [ebuild  N     ] dev-perl/Capture-Tiny-0.360.0::gentoo  USE="{-test}" 36 KiB
    [ebuild  N     ] virtual/perl-File-Path-2.90.0-r4::gentoo  0 KiB
    [ebuild  N     ] dev-perl/IPC-Run3-0.48.0::gentoo  USE="{-test}" 20 KiB
    [ebuild  N     ] dev-perl/autovivification-0.160.0::gentoo  49 KiB
    [ebuild  N     ] dev-perl/Data-Uniqid-0.120.0-r1::gentoo  3 KiB
    [ebuild  N    ~] dev-perl/Lingua-Translit-0.250.0::gentoo  385 KiB
    [ebuild  N    ~] dev-perl/File-Slurp-Tiny-0.4.0::gentoo  USE="{-test}" 13 KiB
    [ebuild  N     ] dev-perl/Exporter-Tiny-0.42.0::gentoo  USE="{-test}" 32 KiB
    [ebuild  N    ~] dev-perl/Tie-Cycle-1.221.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    ~] dev-perl/Business-ISBN-Data-20140910.3.0::gentoo  USE="{-test}" 21 KiB
    [ebuild  N     ] perl-core/CPAN-Meta-2.150.1::gentoo  USE="{-test}" 98 KiB
    [ebuild  N     ] dev-perl/List-MoreUtils-0.413.0::gentoo  USE="{-test}" 129 KiB
    [ebuild  N    ~] dev-perl/Config-AutoConf-0.313.0::gentoo  USE="{-test}" 48 KiB
    [ebuild  N    ~] dev-perl/Business-ISBN-2.90.200_rc::gentoo  USE="-barcode {-test} -xisbn" 354 KiB
    [ebuild  N    ~] dev-perl/Business-ISMN-1.130.0::gentoo  USE="{-test}" 10 KiB
    [ebuild  N    ~] dev-perl/Encode-JIS2K-0.30.0::gentoo  410 KiB
    [ebuild  N    ~] dev-perl/Encode-HanExtra-0.230.0-r1::gentoo  1,530 KiB
    [ebuild  N    ~] dev-perl/Encode-EUCJPASCII-0.30.0::gentoo  129 KiB
    [ebuild  N     ] dev-perl/Unicode-LineBreak-2016.3.0::gentoo  297 KiB
    [ebuild  N     ] dev-perl/Log-Log4perl-1.460.0::gentoo  USE="{-test}" 272 KiB
    [ebuild  N     ] dev-perl/List-AllUtils-0.90.0::gentoo  USE="{-test}" 19 KiB
    [ebuild  N     ] dev-perl/Readonly-2.0.0::gentoo  USE="{-test}" 24 KiB
    [ebuild  N    ~] dev-perl/File-Slurp-Unicode-0.7.1-r1::gentoo  4 KiB
    [ebuild  N    ~] dev-perl/ExtUtils-LibBuilder-0.80.0::gentoo  USE="{-test}" 6 KiB
    [ebuild  N     ] dev-perl/Text-Glob-0.90.0-r1::gentoo  5 KiB
    [ebuild  N    ~] dev-perl/Readonly-XS-1.50.0-r1::gentoo  9 KiB
    [ebuild  N    ~] dev-perl/Text-BibTeX-0.770.0::gentoo  289 KiB
    [ebuild  N     ] dev-perl/File-Find-Rule-0.330.0-r1::gentoo  USE="{-test}" 15 KiB
    [ebuild  N     ] dev-perl/Data-Compare-1.250.0::gentoo  USE="{-test}" 26 KiB
    [ebuild  N     ] dev-perl/XML-LibXSLT-1.940.0::gentoo  112 KiB
    [ebuild  N    ~] dev-perl/XML-LibXML-Simple-0.970.0::gentoo  USE="{-test}" 23 KiB
    [ebuild  N     ] dev-tex/biber-2.5::gentoo  USE="-doc {-test}" 1,219 KiB
    Total: 53 packages (1 downgrade, 52 new), Size of downloads: 5,917 KiB
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    dev-lang/perl:0
      (dev-lang/perl-5.24.0-r2:0/5.24::gentoo, installed) pulled in by
        =dev-lang/perl-5.24* required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Digest-Perl-MD5-1.900.0:0/0::gentoo, installed)
                     ^^^^^^^^
        (and 79 more with the same problems)
      (dev-lang/perl-5.22.2:0/5.22::gentoo, ebuild scheduled for merge) pulled in by
        dev-lang/perl:0/5.22= required by (virtual/perl-Storable-2.530.100-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-ExtUtils-MakeMaker-7.40.100_rc-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
        (and 55 more with the same problems)
    NOTE: Use the '--verbose-conflicts' option to display parents omitted above
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.

    It is asked to downgrade to `perl=5.22.2`. Why?

     

    I tried to upgrade one or two of the packages before realising the list is really long:

    emerge -av biber --verbose-conflicts
    
    [..]
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/perl:0
    
      (dev-lang/perl-5.24.0-r2:0/5.24::gentoo, installed) pulled in by
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTTP-Daemon-6.10.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Types-Serialiser-1.0.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/XML-SAX-Base-1.80.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTML-Parser-3.710.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Net-Daemon-0.480.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/XML-Simple-2.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Error-0.170.240:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Digest-SHA1-2.130.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/XML-LibXML-2.12.100:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/XML-Parser-2.440.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/JSON-XS-3.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTTP-Cookies-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Date-Manip-6.510.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTTP-Date-6.20.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (sys-apps/texinfo-6.3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Normalize-1.250.0-r2:0/0::gentoo, ebuild schedu
    led for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/File-Which-1.90.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Unicode-Map-0.112.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/DBI-1.636.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Digest-HMAC-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/Net-HTTP-6.90.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Test-Simple-1.1.14_p522-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/IO-HTML-1.1.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Authen-SASL-2.160.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/AnyEvent-7.120.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Digest-Perl-MD5-1.900.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/IO-stringy-2.111.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/Net-SSLeay-1.720.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/DBD-mysql-4.41.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/libintl-perl-1.240.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Encode-Locale-1.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (net-irc/irssi-1.0.3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/OLE-StorageLite-0.190.0-r1:0/0::gentoo, install
    ed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/HTTP-Message-6.110.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-tex/html2latex-1.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/PlRPC-0.202.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (x11-terms/rxvt-unicode-9.21:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-IPC-Cmd-0.920.0-r5:0/0::gentoo, ebuild scheduled for
    merge)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Text-Unidecode-1.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Crypt-PasswdMD5-1.400.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/WWW-RobotRules-6.20.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Spreadsheet-ParseExcel-0.650.0:0/0::gentoo, ins
    talled)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/IO-Socket-SSL-2.24.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-Storable-2.560.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-vcs/git-2.11.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-ExtUtils-MakeMaker-7.100.100_rc-r2:0/0::gentoo, instal
    led)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/Module-Build-0.421.600:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-Carp-1.400.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/libwww-perl-6.150.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Algorithm-Diff-1.190.300:0/0::gentoo, installed
    )
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-File-Temp-0.230.400-r5:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Net-SMTP-SSL-1.30.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/File-DesktopEntry-0.40.0-r1:0/0::gentoo, instal
    led)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/LWP-Protocol-https-6.60.0:0/0::gentoo, installe
    d)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/File-Listing-6.40.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/File-BaseDir-0.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-vcs/subversion-1.9.5:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Unicode-Collate-1.140.0-r2:0/0::gentoo, ebuild schedule
    d for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Unicode-EastAsianWidth-1.330.0-r1:0/0::gentoo,
    installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/File-MimeInfo-0.270.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/TermReadKey-2.330.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-Storable-2.560.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/AnyEvent-I3-0.160.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (virtual/perl-Encode-2.730.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/Crypt-RC4-2.020.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/URI-1.710.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTTP-Negotiate-6.10.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.24* required by (virtual/perl-Carp-1.400.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-ExtUtils-MakeMaker-7.100.100_rc-r2:0/0::gentoo, insta
    lled)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24= required by (dev-perl/Text-CSV_XS-1.230.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/XML-NamespaceSupport-1.110.0-r1:0/0::gentoo, in
    stalled)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/LWP-MediaTypes-6.20.0-r1:0/0::gentoo, installed
    )
                     ^^^^^^^^
    
        =dev-lang/perl-5.24.0* required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/common-sense-3.740.0:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.24=[-build(-)] required by (dev-perl/HTML-Tagset-3.200.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
    
      (dev-lang/perl-5.22.2:0/5.22::gentoo, ebuild scheduled for merge) pulled in by
        =dev-lang/perl-5.22* required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Perl-OSType-1.8.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-Requirements-2.132.0-r1:0/0::gentoo, ebuild s
    cheduled for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Install-2.40.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-Manifest-1.700.0-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Data-Dumper-2.158.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Zlib-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-SHA-5.950.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Module-Metadata-1.0.26-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Text-ParseWords-3.300.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Math-BigInt-1.999.700-r1:0/0::gentoo, ebuild scheduled
    for merge)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Sys-Syslog-0.330.0-r6:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-parent-0.232.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Scalar-List-Utils-1.410.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Test-Simple-1.1.14_p522-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-ExtUtils-CBuilder-0.280.221-r1:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-libnet-3.50.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-Parse-CPAN-Meta-1.441.400-r3:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        =dev-lang/perl-5.22* required by (virtual/perl-Term-ANSIColor-4.30.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-1.170.0-r9:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-IO-1.350.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
    
        =dev-lang/perl-5.22.2* required by (virtual/perl-IO-Compress-2.68.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
                     ^^^^^^^^
    
        dev-lang/perl:0/5.22= required by (virtual/perl-Time-Local-1.230.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Exporter-5.720.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Getopt-Long-2.450.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-ExtUtils-ParseXS-3.280.0-r1:0/0::gentoo, installed)
        ^              ^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Digest-MD5-2.540.0-r2:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-version-0.990.900-r3:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-CPAN-Meta-2.150.1-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-File-Spec-3.560.100-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-CPAN-Meta-YAML-0.12.0-r2:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-version-0.990.900-r3:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-XSLoader-0.200.0-r2:0/0::gentoo, ebuild scheduled for merge)
        ^              ^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-Compress-Raw-Bzip2-2.68.0-r1:0/0::gentoo, installed)
                     ^^^^^^^^
        dev-lang/perl:0/5.22= required by (virtual/perl-JSON-PP-2.273.0-r4:0/0::gentoo, installed)
                     ^^^^^^^^
        =dev-lang/perl-5.22* required by (virtual/perl-Time-HiRes-1.972.600-r3:0/0::gentoo, installed)
        ^              ^^^^^
        =dev-lang/perl-5.22.2* required by (virtual/perl-Test-Harness-3.350.0-r2:0/0::gentoo, installed)
        ^              ^^^^^^^
    
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously. You may want to try a larger value of
    the --backtrack option, such as --backtrack=30, in order to see if
    that will solve this conflict automatically.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
  13. And, important:

    USE="-cjk" emerge --update --newuse --deep --with-bdeps=y
     @world
    Calculating dependencies... done!
    
    !!! Multiple package instances within a single package slot have been pulled
    !!! into the dependency graph, resulting in a slot conflict:
    
    dev-lang/tcl:0
    
      (dev-lang/tcl-8.6.6:0/8.6::gentoo, installed) pulled in by
        ~dev-lang/tcl-8.6.6:0/8.6=[abi_x86_64(-)] required by (dev-lang/tk-8.6.6:0/8.6::gentoo, installed)
        ^             ^^^^^^^^^^^^
    
        (and 1 more with the same problem)
    
      (dev-lang/tcl-8.5.17:0/8.5::gentoo, ebuild scheduled for merge) pulled in by
        dev-lang/tcl:0/8.5= required by (dev-libs/libnatspec-0.2.6-r1:0/0::gentoo, installed)
                    ^^^^^^^
    
    
    dev-qt/qtcore:4
    
      (dev-qt/qtcore-4.8.7-r2:4/4::gentoo, ebuild scheduled for merge) pulled in by
        >=dev-qt/qtcore-4.8.7-r2:4 required by (app-crypt/qca-2.1.3-r1:2/2::gentoo, ebuild scheduled for merge
    )
        ^^              ^^^^^^^^^^
    
        ~dev-qt/qtcore-4.8.7[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_m
    ips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (d
    ev-qt/qtscript-4.8.7:4/4::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
    
    
    
        (and 4 more with the same problems)
    
      (dev-qt/qtcore-4.8.6-r2:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtcore-4.8.6[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_m
    ips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (d
    ev-qt/qtdbus-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
    
    
    
        (and 12 more with the same problem)
    
    dev-qt/qtcore:5
    
      (dev-qt/qtcore-5.7.1-r1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtcore-5.7.1:5 required by (kde-plasma/ksysguard-5.9.2:5/5::gentoo, installed)
        ^^              ^^^^^^^
    
        ~dev-qt/qtcore-5.7.1 required by (dev-qt/qtgraphicaleffects-5.7.1:5/5.7::gentoo, installed)
        ^              ^^^^^
    
        (and 33 more with the same problems)
    
      (dev-qt/qtcore-5.6.2-r1:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtcore-5.6.2 required by (dev-qt/qtwayland-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
    
        (and 9 more with the same problem)
    
    dev-qt/qtgui:5
    
      (dev-qt/qtgui-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtgui-5.7.1:5[jpeg] required by (kde-plasma/plasma-workspace-5.9.2:5/5::gentoo, installed)
        ^^             ^^^^^^^
    
        ~dev-qt/qtgui-5.7.1 required by (dev-qt/qtgraphicaleffects-5.7.1:5/5.7::gentoo, installed)
        ^             ^^^^^
    
        (and 21 more with the same problems)
    
      (dev-qt/qtgui-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtgui-5.6.2[egl=] required by (dev-qt/qtwayland-5.6.2:5/5.6::gentoo, ebuild scheduled for merg
    e)
        ^             ^^^^^
    
        (and 2 more with the same problem)
    
    dev-qt/qtgui:4
    
      (dev-qt/qtgui-4.8.7:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtgui-4.8.7[accessibility=,aqua=,debug=,qt3support,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-
    )?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s3
    90_64(-)?] required by (dev-qt/qt3support-4.8.7:4/4::gentoo, ebuild scheduled for merge)
        ^             ^^^^^
    
    
    
        (and 1 more with the same problem)
    
      (dev-qt/qtgui-4.8.6-r4:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtgui-4.8.6[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mi
    ps_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by (de
    v-qt/qtwebkit-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge)
        ^             ^^^^^
    
    
    
        (and 6 more with the same problem)
    
    dev-qt/qtscript:4
    
      (dev-qt/qtscript-4.8.7:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtscript-4.8.7[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi
    _mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by
    (dev-qt/qtgui-4.8.7:4/4::gentoo, ebuild scheduled for merge)
        ^                ^^^^^
    
    
    
    
      (dev-qt/qtscript-4.8.6-r2:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtscript-4.8.6[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi
    _mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required by
    (dev-qt/qtgui-4.8.6-r4:4/4::gentoo, ebuild scheduled for merge)
        ^                ^^^^^
    
    
    
        (and 2 more with the same problem)
    
    dev-qt/qtsql:4
    
      (dev-qt/qtsql-4.8.7-r1:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtsql-4.8.7[aqua=,debug=,qt3support,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32
    (-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] requ
    ired by (dev-qt/qt3support-4.8.7:4/4::gentoo, ebuild scheduled for merge)
        ^             ^^^^^
    
    
    
    
      (dev-qt/qtsql-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtsql-4.8.6[aqua=,debug=,qt3support=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n3
    2(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] req
    uired by (dev-qt/qtdeclarative-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge)
        ^             ^^^^^
    
    
    
        (and 1 more with the same problem)
    
    dev-qt/qtdbus:5
    
      (dev-qt/qtdbus-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtdbus-5.7.1:5 required by (kde-plasma/kwin-5.9.2:5/5::gentoo, installed)
        ^^              ^^^^^^^
    
        ~dev-qt/qtdbus-5.7.1 required by (dev-qt/qtgui-5.7.1:5/5.7::gentoo, installed)
        ^              ^^^^^
    
        (and 9 more with the same problems)
    
      (dev-qt/qtdbus-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtdbus-5.6.2 required by (dev-qt/qtbluetooth-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
        ^              ^^^^^
    
        >=dev-qt/qtdbus-5.6.1:5/5.6= required by (kde-frameworks/kauth-5.29.0:5/5.29::gentoo, installed)
                             ^^^^^^^
    
        (and 1 more with the same problems)
    
    dev-qt/qttest:5
    
      (dev-qt/qttest-5.7.1:5/5.7::gentoo, installed) pulled in by
        ~dev-qt/qttest-5.7.1 required by (dev-qt/qtdeclarative-5.7.1:5/5.7::gentoo, installed)
        ^              ^^^^^
    
    
      (dev-qt/qttest-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qttest-5.6.2 required by (dev-qt/qtdeclarative-5.6.2:5/5.6::gentoo, ebuild scheduled for merge
    )
        ^              ^^^^^
    
    
    dev-qt/qtdeclarative:5
    
      (dev-qt/qtdeclarative-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtdeclarative-5.7.1:5 required by (kde-plasma/kwin-5.9.2:5/5::gentoo, installed)
        ^^                     ^^^^^^^
    
        ~dev-qt/qtdeclarative-5.7.1 required by (dev-qt/qtwebkit-5.7.1:5/5.7::gentoo, ebuild scheduled for mer
    ge)
        ^                     ^^^^^
    
        (and 8 more with the same problems)
    
      (dev-qt/qtdeclarative-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtdeclarative-5.6.2 required by (dev-qt/qtbluetooth-5.6.2:5/5.6::gentoo, ebuild scheduled for
    merge)
        ^                     ^^^^^
    
    
    dev-qt/qttranslations:4
    
      (dev-qt/qttranslations-4.8.7:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qttranslations-4.8.7 required by (dev-qt/qtcore-4.8.7-r2:4/4::gentoo, ebuild scheduled for mer
    ge)
        ^                      ^^^^^
    
    
      (dev-qt/qttranslations-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qttranslations-4.8.6 required by (dev-qt/qtcore-4.8.6-r2:4/4::gentoo, ebuild scheduled for mer
    ge)
        ^                      ^^^^^
    
    
    dev-qt/qt3support:4
    
      (dev-qt/qt3support-4.8.7:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qt3support-4.8.7[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,a
    bi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required b
    y (dev-qt/qtgui-4.8.7:4/4::gentoo, ebuild scheduled for merge)
        ^                  ^^^^^
    
    
    
    
      (dev-qt/qt3support-4.8.6-r1:4/4::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qt3support-4.8.6[aqua=,debug=,abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,a
    bi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?] required b
    y (dev-qt/qtgui-4.8.6-r4:4/4::gentoo, ebuild scheduled for merge)
        ^                  ^^^^^
    
    
    
        (and 1 more with the same problem)
    
    app-text/hunspell:0
    
      (app-text/hunspell-1.6.1-r1:0/1.6::gentoo, installed) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (app-text/hunspell-1.3.3:0/0::gentoo, ebuild scheduled for merge) pulled in by
        app-text/hunspell:0/0= required by (kde-frameworks/sonnet-5.29.0:5/5.29::gentoo, installed)
                         ^^^^^
    
    
    media-libs/libwebp:0
    
      (media-libs/libwebp-0.5.2:0/6::gentoo, installed) pulled in by
        media-libs/libwebp:0/6= required by (media-gfx/imagemagick-7.0.5.7:0/7.0.5.7::gentoo, installed)
                          ^^^^^
    
    
      (media-libs/libwebp-0.4.2:0/5::gentoo, ebuild scheduled for merge) pulled in by
        media-libs/libwebp:0/5= required by (dev-python/pillow-3.4.2-r1:0/0::gentoo, installed)
                          ^^^^^
    
    
    dev-qt/qtnetwork:5
    
      (dev-qt/qtnetwork-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtnetwork-5.7.1:5 required by (kde-plasma/kscreenlocker-5.9.2:5/5::gentoo, installed)
        ^^                 ^^^^^^^
    
        ~dev-qt/qtnetwork-5.7.1 required by (dev-qt/designer-5.7.1:5/5.7::gentoo, ebuild scheduled for merge)
        ^                 ^^^^^
    
        (and 5 more with the same problems)
    
      (dev-qt/qtnetwork-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtnetwork-5.6.2 required by (dev-qt/qtxmlpatterns-5.6.2:5/5.6::gentoo, ebuild scheduled for me
    rge)
        ^                 ^^^^^
    
        (and 2 more with the same problem)
    
    dev-qt/qtconcurrent:5
    
      (dev-qt/qtconcurrent-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtconcurrent-5.7.1:5 required by (kde-plasma/plasma-workspace-5.9.2:5/5::gentoo, installed)
        ^^                    ^^^^^^^
    
        (and 1 more with the same problem)
    
      (dev-qt/qtconcurrent-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtconcurrent-5.6.2 required by (dev-qt/qtbluetooth-5.6.2:5/5.6::gentoo, ebuild scheduled for m
    erge)
        ^                    ^^^^^
    
    
    dev-qt/qtwidgets:5
    
      (dev-qt/qtwidgets-5.7.1:5/5.7::gentoo, installed) pulled in by
        >=dev-qt/qtwidgets-5.7.1:5 required by (kde-plasma/breeze-5.9.2:5/5::gentoo, installed)
        ^^                 ^^^^^^^
    
        ~dev-qt/qtwidgets-5.7.1[gles2=] required by (dev-qt/qtopengl-5.7.1:5/5.7::gentoo, ebuild scheduled for
     merge)
        ^                 ^^^^^
    
        (and 16 more with the same problems)
    
      (dev-qt/qtwidgets-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtwidgets-5.6.2[gles2=] required by (dev-qt/qtdeclarative-5.6.2:5/5.6::gentoo, ebuild schedule
    d for merge)
        ^                 ^^^^^
    
    
    dev-qt/qtxmlpatterns:5
    
      (dev-qt/qtxmlpatterns-5.6.2:5/5.6::gentoo, ebuild scheduled for merge) pulled in by
        ~dev-qt/qtxmlpatterns-5.6.2 required by (dev-qt/qtdeclarative-5.6.2:5/5.6::gentoo, ebuild scheduled for merge)
        ^                     ^^^^^
    
      (dev-qt/qtxmlpatterns-5.7.1:5/5.7::gentoo, installed) pulled in by
        ~dev-qt/qtxmlpatterns-5.7.1 required by (dev-qt/qtdeclarative-5.7.1:5/5.7::gentoo, installed)
        ^                     ^^^^^
    
    net-libs/gnutls:0
    
      (net-libs/gnutls-3.5.13:0/30::gentoo, installed) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (net-libs/gnutls-3.3.26:0/0::gentoo, ebuild scheduled for merge) pulled in by
        >=net-libs/gnutls-3:0/0=[abi_x86_64(-)] required by (net-libs/glib-networking-2.46.1:0/0::gentoo, installed)
                           ^^^^^
    
    dev-libs/nettle:0
    
      (dev-libs/nettle-3.3-r1:0/6.1::gentoo, ebuild scheduled for merge) pulled in by
        (no parents that aren't satisfied by other packages in this slot)
    
      (dev-libs/nettle-3.2-r1:0/6::gentoo, installed) pulled in by
        >=dev-libs/nettle-3.1:0/6=[gmp,abi_x86_32(-),abi_x86_64(-)] required by (net-libs/gnutls-3.5.13:0/30::gentoo, installed)
                             ^^^^^
    
    NOTE: Use the '--verbose-conflicts' option to display parents omitted above
    
    It may be possible to solve this problem by using package.mask to
    prevent one of those packages from being selected. However, it is also
    possible that conflicting dependencies exist such that they are
    impossible to satisfy simultaneously.  If such a conflict exists in
    the dependencies of two different packages, then those packages can
    not be installed simultaneously.
    
    For more information, see MASKED PACKAGES section in the emerge man
    page or refer to the Gentoo Handbook.
    
    
    !!! The ebuild selected to satisfy ">=dev-libs/efl-1.15.1" has unmet requirements.
    - dev-libs/efl-1.17.0-r1::gentoo USE="X bmp eet fontconfig gif gnutls ico jpeg2k nls opengl png ppm psd pulseaudio ssl tga tiff v4l webp -debug -doc -drm -egl -fbcon -fribidi -gles -glib -gstreamer -harfbuzz -ibus (-libressl) (-neon) -oldlua -physics (-pixman) -scim -sdl -sound -systemd -tslib -unwind -valgrind -wayland -xim -xine -xpm"
    
      The following REQUIRED_USE flag constraints are unsatisfied:
        pulseaudio? ( sound )
    
      The above constraints are a subset of the following complete expression:
        pulseaudio? ( sound ) opengl? ( any-of ( X sdl wayland ) ) gles? ( any-of ( X wayland ) ) gles? ( !sdl ) gles? ( egl ) sdl? ( opengl ) wayland? ( egl !opengl gles ) xim? ( X )
    
    (dependency required by "x11-terms/terminology-0.9.1::gentoo" [installed])
    (dependency required by "@selected" [set])
    (dependency required by "@world" [argument])
    
    
  14. I have a hard time updating world. I am on `funtoo-stable`.

     

    Environment details can be seen here: https://paste.pound-python.org/show/pYzyc5Hv6vqNvzSNqrMs/.

     

    Profile:

    ? epro show
    
    === Enabled Profiles: ===
    
            arch: x86-64bit
           build: stable
         subarch: intel64-haswell
          flavor: desktop
         mix-ins: mediadevice-audio-consumer
         mix-ins: mediaformat-video-common
         mix-ins: audio
         mix-ins: X
         mix-ins: mediaformat-gfx-common
         mix-ins: mediaformat-gfx-extra
         mix-ins: mediaformat-audio-common
         mix-ins: console-extras
         mix-ins: mediadevice-video-consumer
         mix-ins: mediaformat-video-extra
         mix-ins: mediaformat-audio-extra
         mix-ins: media
         mix-ins: kde-plasma-5
    
    
    === All inherited flavors from desktop flavor: ===
    
                         workstation (from desktop flavor)
                                core (from workstation flavor)
                             minimal (from core flavor)
    
    === All inherited mix-ins from desktop flavor: ===
    
                                   X (from workstation flavor)
                               audio (from workstation flavor)
                                 dvd (from workstation flavor)
                               media (from workstation flavor)
          mediadevice-audio-consumer (from media mix-in)
                    mediadevice-base (from mediadevice-audio-consumer mix-in)
          mediadevice-video-consumer (from media mix-in)
                    mediadevice-base (from mediadevice-video-consumer mix-in)
            mediaformat-audio-common (from media mix-in)
              mediaformat-gfx-common (from media mix-in)
            mediaformat-video-common (from media mix-in)
                      console-extras (from workstation flavor)
                               print (from desktop flavor)
    
    === All inherited mix-ins from mediadevice-audio-consumer mix-in: ===
    
                    mediadevice-base (from mediadevice-audio-consumer mix-in)
    
    === All inherited mix-ins from mediaformat-gfx-extra mix-in: ===
    
              mediaformat-gfx-common (from mediaformat-gfx-extra mix-in)
    
    === All inherited mix-ins from mediadevice-video-consumer mix-in: ===
    
                    mediadevice-base (from mediadevice-video-consumer mix-in)
    
    === All inherited mix-ins from mediaformat-video-extra mix-in: ===
    
            mediaformat-video-common (from mediaformat-video-extra mix-in)
    
    === All inherited mix-ins from mediaformat-audio-extra mix-in: ===
    
            mediaformat-audio-common (from mediaformat-audio-extra mix-in)
    
    === All inherited mix-ins from media mix-in: ===
    
          mediadevice-audio-consumer (from media mix-in)
                    mediadevice-base (from mediadevice-audio-consumer mix-in)
          mediadevice-video-consumer (from media mix-in)
                    mediadevice-base (from mediadevice-video-consumer mix-in)
            mediaformat-audio-common (from media mix-in)
              mediaformat-gfx-common (from media mix-in)
            mediaformat-video-common (from media mix-in)
    
    

    I fear KDE packages are the problem. How can I cleanly reinstall KDE?

    I tried removing the mix-in and remove/clean but I did not succeed.

     

    Is there a standard process to follow?  Like remove everything and keep the essential to have a running system, then reinstall whatever wanted? Without loosing configuration files, of course.

     

    Or is it better to try to resolve conflicts, one-by-one?  But, it appears that they are too many.

  15. My stage3:

     >>> Release:                       stage3-generic_64-funtoo-current-2015-05-27
     >>> Version:                       2015-05-27
     >>> Created by:                    Daniel Robbins <drobbins@funtoo.org>
    
     >>> Send suggestions, improvements, bug reports relating to...
    
     >>> This release:                  Daniel Robbins <drobbins@funtoo.org>
     >>> Funtoo Linux (general):        Funtoo Linux (http://www.funtoo.org)
     >>> Gentoo Linux (general):        Gentoo Linux (http://www.gentoo.org)
    
    
    

     

     

    How do we report this?

  16. I want to create newer e-builds for

     

    To start, I have followed the steps outlined at <http://www.funtoo.org/Local_Overlay>.  I created a local overlay named osgeo and went through the rest of the steps.  What are the next steps?  In example, what is the first thing to do in the "new" ebuild which is still a copy of the latest older existing ebuild, after having ran

    ebuild  gdal-2.1.3.ebuild manifest

    Note, running

    ebuild *.ebuild manifest 

    as suggested in the Wiki, I get

    !!! doebuild: 'gdal-2.1.3.ebuild' is not one of the following valid commands:
    !!! clean      cleanrm    compile    config     configure  depend
    !!! digest     fetch      fetchall   help       info       install
    !!! manifest   merge      nofetch    package    postinst   postrm
    !!! preinst    prepare    prerm      pretend    qmerge     rpm
    !!! setup      test       unmerge    unpack 

    Trying to emerge the "local" ebuild, comes with a WARNING not doing so:

    *** emerging by path is broken and may not always work!!!
    
    
    These are the packages that would be merged, in order:
    
    Calculating dependencies \
    *** You are emerging a masked package. It is MUCH better to use
    *** /etc/portage/package.* to accomplish this. See portage(5) man
    *** page for details.
    >>> Waiting 10 seconds before starting...
    >>> (Control-C to abort)...
    Continuing... in: 10 9 8... done!
    

    For example, I navigate in /var/overlay/local/sci-libs/gdal where there are

    -rw-r--r-- 1 root root  758 Mar 11 13:47 Manifest
    drwxr-xr-x 2 root root    2 Mar 11 13:53 files
    -rw-r--r-- 1 root root 7439 Mar 11 13:43 gdal-2.0.3.ebuild
    -rw-r--r-- 1 root root 7439 Mar 11 13:45 gdal-2.1.3.ebuild
    

    What's on here?  -- Similar I have done for grass. Thanks for any hints.

     

    See also

  17. ive no experience with ZFS, however it should be as simple as adding the --zfs flag to genkernel.  consider this to be similar to how users EFI stub boot gentoo using LUKS and LVM. 

     

    Hi nimbius.  Eh, I don't see the answer in my question. Installing Funtoo in a ZFS setup is ok -- following the installation guide. Please revisit my question if you care. Thanks.

  18. Old topic, still valid.  Now that the ZFS installation guide has been refreshed, and works, is it still too complicated to add a LUKS section in it? Would you encourage to do so? Or not?

     

    More interesting:  is it possible and if yes, is there any reason not to:

    • backup an existing ZFS pool
    • wipe the target disk to erase traces of old data
    • create a LUKS encrypted container
    • map the LUKS container (and optionally, wipe it!)
    • setup ZFS and "restore" the pool from the backup

    ?

     

    Note, it seems that native encryption for ZoL is a work in progress and should be soon available (?).

    See also: https://forums.anandtech.com/threads/gentoo-funtoo-zfs-luks-and-initramfs.2451033/.

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