debian-sources take 14 gigabytes of space to build, which is not checked by ebuild. It should has CHECKREQS_DISK_BUILD="12G" in ebuild.
CHECKREQS_DISK_BUILD="14G", I meant.
Again, use-flag 'binary' causes this. Sorry for multicomment.
This is a bug tracker for Gentoo Linux, not Funtoo.
Ben, Gentoo linux has ebuild 'debian-sources'. 'debian-sources' ebuild has 'binary' use-flag in gentoo.
No such package in the Portage tree.