How to configure perl to always run code coverage

I want my project to always run scripts via the perl Devel :: Cover module. I tried to replace the perl binary with something like this

#!/bin/sh
exec /usr/local/bin/original-perl -MDevel::Cover $@

      

        
        
        
      

    

without success. I would like to avoid changing #!

for every script on my system (not at the end of the world, I would just like to find a more global solution).

Any thoughts on how to enable Devel :: Cover globally?

Edit: Don't try to run this in production, just try some experimentation to figure out how to split the tightly coupled codebase. It would be helpful to have some automated way to see what source files are needed for a given subsystem (at least for a start)