% which perl
/usr/bin/perl

% perl -V | perl -ne 'print if /INC/...//'
  @INC:
    /Library/Perl/5.18/darwin-thread-multi-2level
    /Library/Perl/5.18
    /Network/Library/Perl/5.18/darwin-thread-multi-2level
    /Network/Library/Perl/5.18
    /Library/Perl/Updates/5.18.2/darwin-thread-multi-2level
    /Library/Perl/Updates/5.18.2
    /System/Library/Perl/5.18/darwin-thread-multi-2level
    /System/Library/Perl/5.18
    /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level
    /System/Library/Perl/Extras/5.18
    .

% perl -MMoose -e1
Invalid version format (version required) at /Library/Perl/5.18/Module/Runtime.pm line 396.
BEGIN failed--compilation aborted.

% perldoc -l Moose
/System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/Moose.pm

% sudo rm /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/Moose.pm
Password:
override rw-r--r--  root/wheel restricted,compressed for /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/Moose.pm? y
rm: /System/Library/Perl/Extras/5.18/darwin-thread-multi-2level/Moose.pm: Operation not permitted