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$ perl -v This is perl 5, version 12, subversion 3 (v5.12.3) built for darwin-th +read-multi-2level (with 2 registered patches, see perl -V for more detail) --truncated remaining output--
$ perlbrew list-modules | perlbrew exec --with perl-5.16.0t cpanm perl-5.16.0t ========== ... dyld: Symbol not found: _Perl_Gthr_key_ptr Referenced from: /Users/abualiga/perl5/lib/perl5/darwin-thread-multi +-2level/auto/Cwd/Cwd.bundle Expected in: flat namespace