My first reaction was to see if the project is made with Commnon Lisp's ASDF, and cool now it has plugins for different languages. Common Lisp ASDF is very well thought out, but not the easiest package management system.
Yeah I was really wondering who found it easier to hack ASDF to work with other languages than just use a few separate package management solutions. It's an incredible library, but man I would not want to push its limits or it would go from odd to unusable pretty quick.