Some modules require newer Module-Build-Tiny (for ex. Dist-Zilla-Plugin-ModuleBuildTiny-0.005 require Module-Build-Tiny-0.026) which result in breaking g-cpan while generating ebuild for it. I'm asking because it's not ease to just rename this ebuild and add it to own overlay - it use custom eclass, so we need to either copy eclass too or add dependency on perl-experimental (or -snapshot?) overlay in metadata/layout.conf - i.e. it's overcomplicated.
https://github.com/gentoo-perl/perl-experimental/commit/8978e10ba6f7727ddce3417f22cb6044e17e074d Will replicate to -snapshot shortly.
Though, if you have anything with Module::Build::Tiny as a dependency for building, you'll want that eclass too. Because the standard one assumes Module::Build semantics, which just bail due to invoking a command that doesn't exist on MB:Tiny.
(In reply to Kent Fredric from comment #2) > Though, if you have anything with Module::Build::Tiny as a dependency for > building, you'll want that eclass too. Not really, see bug 495044.