in reply to Building a local perl to use the system perl's libraries as a fallback
Look for threads on "installing Perl as a non-root user." You can set up your own personalized copy of Perl and you probably want to do so if Perl is used as part of the package-management software (or other key software) on your Linux distro. Use packages (only...) to maintain whatever the other parts of your system depend on. Use the "non-root user" techniques to maintain, separately, your own custom environments. Keep the two entirely separate.