What about prepare-dev.py?
Stop shipping our own copy of the Django Admin media files.
Review Request #1807 — Created Oct. 2, 2010 and submitted
Stop shipping our own copy of the Django Admin media files. For historical reasons, we've shipped the Django Admin media files as part of our build directory. This comes from a time before rb-site existed, when we needed a single media directory with everything inside it. However, that's just problematic these days. Now we let the Django devserver handle the /media/admin path as it prefers to, and we link the proper path during rb-site upgrade. This lets us reduce our package size and prevents problems people may hit with different versions of Django.
Tested creating and upgrading sites and saw that the media/admin directory pointed to the Django admin media directory. Tested that the media files would load during runserver.