While the CPAN process is quick and easy to publish modules and get code from the web, it still lacks an "uninstall" function. There are a number of ad-hoc tools that (attempt to) uninstall CPAN modules, but the package manager itself has only the install action [0].
Using the system package manager has worked much better for me.
The test matrix, http://www.cpantesters.org/distro/W/WebService-NationBuilder...
The test itself, https://metacpan.org/source/AANARI/WebService-NationBuilder-...