perl6 on Parrot: Revision 7
The Perl 6 Compiler for Parrot is called "rakudo", and it currently lives in the languages/perl6/ directory of the Parrot repository.
To build the perl6 compiler, first get a working copy of Parrot, then change to the languages/perl6/ subdirectory and type "make perl6". This will build the compiler into a binary called perl6, or perl6.exe, or something appropriate for your platform.
To run a program with perl6, one then issues a command like
$ perl6 hello.pl
For additional build instructions, you might also have a look at this PerlMonks post.