[Distutils] Including directories in .eggs?

Hey, I'm wondering how I would go about including an entire directory in the .egg setup.py creates. We are using Dojo, and it automatically builds a directory containing the "stuff" it needs... But just including that directory in package_data doesn't work (as it expects to copy a file, not a directory). Including a glob such as 'js/**/ **' also fails, because directories are listed as part of the '**/ **', and it can't copy those. Any ideas? Thanks, David