Ah, I think I didn't formulate this as understandable as possible. My boss was looking for a language he could implement, as a hobby project. In so far, the incentive would have been there to gain somebody as contributor who has written more than one compiler. But I understand that explaining Perl to non-Perl outsiders is complicated.

You can hack the compiler with nothing but Perl skills.

This basically says to me "if you don't know Perl 5, you can't play". This may be the spin you want to give to things on a Perl website, but it does not really help in attracting people who don't already know/like Perl 5.

If you wanted to say "You can hack the compiler with nothing but Perl 6 skills", please refer to my post about my perception of the Perl 6 documentation and its suitability for people who don't know Perl 5 already.