Thanks @1nickt.

I have tried:

perl -e "print \"@INC\""
[download]

And got:

/etc/perl /usr/local/lib/perl/5.18.2 /usr/local/share/perl/5.18.2 /usr
+/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.18 /usr/share/perl/5.18 /
+usr/local/lib/site_perl
[download]

and perl -v and got:

This is perl 5, version 18, subversion 2 (v5.18.2) built for x86_64-li
+nux-gnu-thread-multi
(with 41 registered patches, see perl -V for more detail)
[download]

Which I think does looks fine.