Wow, that distribution is a poster-boy for how to (ab)use Module::Build. The author creates his modules on the fly during the build process, which is kinda nuts. More importantly, he pre-generates a list of constants ahead of time, then the modules end up explicitly listing every constant. The resulting files are going to look ... well ... ugly.

Now, the process the author uses is kinda nice. Maybe that should be replicated, but definitely not the resulting code.