$ sudo ebuild /var/db/repos/gentoo/www-client/chromium/chromium-54.0.2840.27.ebuild package merge >>> Existing ${T}/environment for 'chromium-54.0.2840.27' will be sourced. >>> Run 'clean' to start with a fresh environment. >>> Checking chromium-54.0.2840.27.tar.xz's mtime... >>> WORKDIR is up-to-date, keeping... * Checking for at least 3 GiB RAM ... [ ok ] * Checking for at least 5 GiB disk space at "/var/tmp/portage/www-client/chromium-54.0.2840.27/temp" ... [ !! ] * There is NOT at least 5 GiB disk space at "/var/tmp/portage/www-client/chromium-54.0.2840.27/temp" * * Space constraints set in the ebuild were not met! * The build will most probably fail, you should enhance the space * as per failed tests. And bam, I can't resume it. Although the space was initially there, and is no longer necessary since it was taken up by the build in progress.