[08:25][nick:~]$ perlbrew list
* perl-5.6.0
  perl-5.16.0
[08:25][nick:~]$ perl -v | head -2

This is perl, v5.6.0 built for darwin
[08:25][nick:~]$ cpan Test::More
Going to read '/Users/nick/.cpan/Metadata'
...