Suggested improvement. Use CPAN::Mini to create a local copy of CPAN, and then inject your versions of patched modules into it. And then configure all of your machines to get copies of modules they need off of that version of CPAN. And now all automated tools will automatically go against your CPAN server and will not accidentally install the wrong version of the module.

Bonus, when you go to install new machines, you'll know that they are getting versions of CPAN modules that have actually been tested in your development environment. (Just be sure to actually upgrade regularly to avoid the pain of a "big bang" upgrade down the road.)

I forget the exact details of setting this up, but brian_d_foy gave an excellent talk on this late last year to the Los Angeles perlmongers. You should be able to get them from him (possibly for the cost of ordering a back issue of The Perl Journal).