From $URL: ftp://ftp.kernel.org/ service will be terminated on March 1, 2017 $ qgrep -H ftp.kernel.org net-nds/yp-tools/yp-tools-2.12-r1.ebuild:SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/net/NIS/${P}.tar.bz2" sys-apps/kbd/kbd-2.0.3.ebuild: SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/kbd/${P}.tar.xz" sys-apps/kbd/kbd-2.0.4.ebuild: SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/kbd/${P}.tar.xz" sys-apps/kbd/kbd-9999.ebuild: SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/kbd/${P}.tar.xz" sys-fs/lufs/lufs-0.9.7-r3.ebuild: elog "# lufis fs=ftpfs,host=ftp.kernel.org /mnt/lufis/ -s" sys-fs/xfsprogs/xfsprogs-4.10.0.ebuild:SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/fs/xfs/${PN}/${P}.tar.xz" sys-fs/xfsprogs/xfsprogs-4.8.0.ebuild:SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/fs/xfs/${PN}/${P}.tar.xz" sys-fs/xfsprogs/xfsprogs-4.9.0.ebuild:SRC_URI="ftp://ftp.kernel.org/pub/linux/utils/fs/xfs/${PN}/${P}.tar.xz" sys-power/pmtools/pmtools-20110323.ebuild:HOMEPAGE="https://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/" sys-power/pmtools/pmtools-20110323.ebuild:SRC_URI="https://ftp.kernel.org/pub/linux/kernel/people/lenb/acpi/utils/${P}.tar.gz"
no match for ftp://ftp.kernel.org/ left in the tree. listed in https://wiki.gentoo.org/wiki/Upstream_repository_shutdowns and closing.