Npm has had github integration for a while now (and straight git integration). Depending on how they setup things, a repo with a good postinstall script will bu

Npm has had github integration for a while now (and straight git integration). Depending on how they setup things, a repo with a good postinstall script will build once it gets pulled so you'll have ES5 compatible files in your node_modules by the time you are running your application. Not that that's an ideal system, but it's an option for some packages.