While installing snapper-9999 the install failed with the following error /usr/lib/portage/python2.7/ebuild-helpers/xattr/install -c -m 644 AUTHORS COPYING '/var/tmp/portage/app-backup/snapper-9999/image//usr/share/doc/snapper-9999' make[2]: Leaving directory '/var/tmp/portage/app-backup/snapper-9999/work/snapper-9999' make[1]: Leaving directory '/var/tmp/portage/app-backup/snapper-9999/work/snapper-9999' /usr/bin/install: cannot stat ‘README’: No such file or directory It looks like the README has been renamed to README.md
I have added a pull request on github: https://github.com/gentoo/gentoo/pull/985
commit 34dfe1500fcaf6d09714ad0224169cc391854561 (HEAD -> master) Merge: 55df22c 3ffdbcd Author: Patrice Clement <monsieurp@gentoo.org> Date: Tue Mar 8 08:34:10 2016 +0000 Merge github#985: app-backup/snapper: update to reflect renamed README.md Pull-Request: https://github.com/gentoo/gentoo/pull/985 Gentoo-Bug: https://bugs.gentoo.org/576556 Reporter: Stefan Langenmaier <stefan.langenmaier@gmail.com> Acked-by: Patrice Clement <monsieurp@gentoo.org> Signed-off-by: Patrice Clement <monsieurp@gentoo.org>