$ export PERLLIB=/root

$ perl-5.16.0 -Mstrict -e1

$ perl-5.18.0 -Mstrict -e1
Can't locate strict.pm:   Permission denied.

$ perl-5.20.0 -Mstrict -e1
Can't locate strict.pm:   Permission denied.

$ perl5.22.0-RC2 -Mstrict -e1
Can't locate strict.pm:   /root/strict.pm: Permission denied.