I guess Grunch doesn't support HTTPS urls, and your stuff goes to that kind of URLs even if HTTP is given.

And at least couple of things that should be investigated...

IIRC, dependencies should point to other Grunch packages, "Hollywood Plugins" isn't available in Grunch.

I also don't see anything provided to check the version of programs on the server.. no URLREADME, no URLPATTERN, no version in the package name.. how could Grunch detect if there's a newer version available?