Perl is available as a software module. No additional perl modules have been installed. Installing local modules using local::lib with cpanm is the preferred method. Here is an example to install and test Math::CDF:
module load perl eval $(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib) cpanm Math::CDF perl -e "require Math::CDF"
To have the appropriate environment available during login, it is recommended to put these lines in the $HOME/.bashrc:
module load perl [ $SHLVL -eq 1 ] && eval "$(perl -I$HOME/perl5/lib/perl5 -Mlocal::lib)"
Additional details on local::lib can be in the local::lib documentation.