Current package still uses old 'user' eclass. Please port to GLEP 81. If you need help, just ask.
https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=afccce06d8deb59eb8434d42c65cc221cc7df516 https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=84b3c8ea900896452c2fafac4710ecf6dafd0349