v5 - Perl5 for rakudo == v5 will let you run Perl 5 code beside Perl 6 code, like: ```perl use v6; grammar Foo { method bar { ... } } { use v5; if( $^O eq 'MSWin32' ) { say $0 # Perl 5's special variable for program name } { use 6.0.0; multi sub foo(*@args) { ... } } } say "Back to Perl 6 on a $*DISTRO.name box." # $*DISTRO is a Perl 6's "special variable" ``` The goal is to be able to run all pure-Perl 5 code besides Perl 6. One benefit of this approach (reimplementing Perl 5 with Perl 6's object system) is to be able to pass data/objects easily between both languages. XS will not be supported, since it depends of Perl 5's internal structure. INSTALLATION -- ```bash panda install v5 ``` USAGE -- ```bash perl6 my_script.pl # run a file that has a `use v5` at the top perl6 -MPerl5 my_old_script.pl # run a file that hasn't ```