>>> Running pre-merge checks for dev-lang/rust-1.30.1-r1
 * Checking for at least 4 GiB RAM ...                                                                                                                [ !! ]
 * There is NOT at least 4 GiB RAM
 * Checking for at least 7 GiB disk space at "/var/tmp/portage/dev-lang/rust-1.30.1-r1/temp" ...                                                      [ ok ]
 * 
 * Space constraints set in the ebuild were not met!
 * The build will most probably fail, you should enhance the space
 * as per failed tests.
 * 
 * ERROR: dev-lang/rust-1.30.1-r1::net-kit failed (pretend phase):
 *   Build requirements not met!
 * 
 * Call stack:
 *               ebuild.sh, line  92:  Called pkg_pretend
 *   rust-1.30.1-r1.ebuild, line  84:  Called pre_build_checks
 *   rust-1.30.1-r1.ebuild, line  80:  Called check-reqs_pkg_setup
 *       check-reqs.eclass, line  99:  Called check-reqs_output
 *       check-reqs.eclass, line 255:  Called die
 * The specific snippet of code:
 *   		[[ ${EBUILD_PHASE} == "pretend" && -z ${I_KNOW_WHAT_I_AM_DOING} ]] && \
 *   			die "Build requirements not met!"
 * 
 * If you need support, post the output of `emerge --info '=dev-lang/rust-1.30.1-r1::net-kit'`,
 * the complete build log and the output of `emerge -pqv '=dev-lang/rust-1.30.1-r1::net-kit'`.
 * The complete build log is located at '/var/tmp/portage/dev-lang/rust-1.30.1-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-lang/rust-1.30.1-r1/temp/die.env'.
 * Working directory: '/var/tmp/portage/dev-lang/rust-1.30.1-r1/homedir'
 * S: '/var/tmp/portage/dev-lang/rust-1.30.1-r1/work/rustc-1.30.1-src'
>>> Running pre-merge checks for x11-drivers/xf86-input-evdev-2.10.5
 * Determining the location of the kernel source code
 * Unable to find kernel sources at /usr/src/linux
 * Please make sure that /usr/src/linux points at your running kernel, 
 * (or the kernel you wish to build against).
 * Alternatively, set the KERNEL_DIR environment variable to the kernel sources location
 * Unable to calculate Linux Kernel version for build, attempting to use running version
 * Found kernel object directory:
 *     /usr/src/linux-debian-sources-4.14.12
 * Found sources for kernel version:
 *     4.14.12-2
 * Checking for suitable kernel configuration options...                                                                                              [ ok ]
>>> Running pre-merge checks for media-video/vlc-3.0.3-r1
>>> Running pre-merge checks for mail-client/thunderbird-60.2.1
 * Checking for at least 4 GiB disk space at "/var/tmp/portage/mail-client/thunderbird-60.2.1/temp" ...                                               [ ok ]
>>> Running pre-merge checks for www-client/firefox-62.0.3
 * Checking for at least 4 GiB disk space at "/var/tmp/portage/www-client/firefox-62.0.3/temp" ...                                                    [ ok ]

 * Messages for package dev-lang/rust-1.30.1-r1:

 * There is NOT at least 4 GiB RAM
 * 
 * Space constraints set in the ebuild were not met!
 * The build will most probably fail, you should enhance the space
 * as per failed tests.
 * 
 * ERROR: dev-lang/rust-1.30.1-r1::net-kit failed (pretend phase):
 *   Build requirements not met!
 * 
 * Call stack:
 *               ebuild.sh, line  92:  Called pkg_pretend
 *   rust-1.30.1-r1.ebuild, line  84:  Called pre_build_checks
 *   rust-1.30.1-r1.ebuild, line  80:  Called check-reqs_pkg_setup
 *       check-reqs.eclass, line  99:  Called check-reqs_output
 *       check-reqs.eclass, line 255:  Called die
 * The specific snippet of code:
 *   		[[ ${EBUILD_PHASE} == "pretend" && -z ${I_KNOW_WHAT_I_AM_DOING} ]] && \
 *   			die "Build requirements not met!"
 * 
 * If you need support, post the output of `emerge --info '=dev-lang/rust-1.30.1-r1::net-kit'`,
 * the complete build log and the output of `emerge -pqv '=dev-lang/rust-1.30.1-r1::net-kit'`.
 * The complete build log is located at '/var/tmp/portage/dev-lang/rust-1.30.1-r1/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/dev-lang/rust-1.30.1-r1/temp/die.env'.
 * Working directory: '/var/tmp/portage/dev-lang/rust-1.30.1-r1/homedir'
 * S: '/var/tmp/portage/dev-lang/rust-1.30.1-r1/work/rustc-1.30.1-src'

 * Messages for package x11-drivers/xf86-input-evdev-2.10.5:

 * Unable to find kernel sources at /usr/src/linux
 * Unable to calculate Linux Kernel version for build, attempting to use running version