See tracker.
This is also needing old cruft like pygtk, gconf-python and libgnome. Also, dead since 2014 and, at present time with Gnome 3.22... people should use seahorse
commit a9a5121b609b096baa19e3a0a15946d361e93d90 Author: Michał Górny <mgorny@gentoo.org> AuthorDate: Mon Aug 14 09:52:56 2017 Commit: Michał Górny <mgorny@gentoo.org> CommitDate: Mon Aug 14 10:02:51 2017 app-misc/relevation: Remove last-rited pkg, #611584 app-misc/relevation/Manifest | 1 - app-misc/relevation/metadata.xml | 5 ----- app-misc/relevation/relevation-1.3.ebuild | 26 -------------------------- profiles/package.mask | 5 ----- 4 files changed, 37 deletions(-)