FYI: the above packages are now available on https://rakudo.perl6.org/downloads/${PN}/${P}.tar.gz (for all versions). It might be a good idea to change the ebuilds to use those, because upstream's done this mostly out of security concerns -- rakudo.org runs an ancient version of WordPress, doesn't have a valid SSL cert, and the site admin has been unreachable for months.
Upstream fixed this one on their end, marking solved