use v6-pugs;

now invokes the new Perl5-based Perl6 compiler:

use v6-pugs;
"hello, world".say;

$ perl -Ilib hello_world.pl

It can even be called from the command line:

$ perl -Ilib lib/v6.pm -e ' "hello, world".say; '

It still fails many of the sanity tests, as well as nearly all of the other tests under t/.