I needed a working implementation of Perl 6, and Jonathan Worthington's Rakudo Perl 6 seems to be the most advanced and properly implemented one.
I got it with
git clone git://github.com/rakudo/rakudo.git
configured it with
perl Configure.pl --gen-parrot
and build it with
All the tests pass, and it seems that I now have a Rakudo Perl 6 working. :) Thanks, Jonathan.