Let the Build system author to evaluate shell commands before they are run. This allows her to add variables like %SOME_SPECIAL_VARIABLE without interfering with PBS.
To install PBS::Log, copy and paste the appropriate command in to your terminal.
cpanm
cpanm PBS::Log
CPAN shell
perl -MCPAN -e shell install PBS::Log
For more information on module installation, please visit the detailed CPAN module installation guide.