If the necessary route is indeed having to reinstall Perl and the CPAN modules you need, you should really have a look at perlbrew. It allows you to install, switch to and manage as many versions of Perl as you like as a non-privileged user, quickly.

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)