https://metacpan.org/source/POTYL/Gtk2-Unique-0.05/Changes https://repology.org/project/perl:gtk2-unique/versions I suppose it should be dev-perl/Gtk2-Unique-0.05
As intended. Perl versions are floats and need to be normalized in Gentoo. https://wiki.gentoo.org/wiki/Project:Perl/Version-Scheme