Created attachment 285579 [details] ebuild for Parallel-Prefork-0.11 www-apps/rt-4.0.x has multiple perl dependencies that aren't in gentoo or perl-experimental. dev-perl/Parallel-Prefork is a sub-dependency of rt. It is A simple prefork server framework.
Added as dependency of new ebuild dev-perl/Parallel-Prefork which is a dependency of new ebuild dev-perl/Starlet which is a dependency of www-apps/rt-4.0.x
dev-perl/Parallel-Prefork-0.130.0 is in the tree now. Thanks