After making `ffmpeg` point to the latest `ffmpeg_4`, all packages that
used `ffmpeg` without requiring a specific version now use ffmpeg_3
explicitly so they shouldn't change.
- devede_ng.py fails trying to import pkg_resources in a clean env w/o python3.7 installed
- Adding setuptools (which has pkg_resources) to the dependencies seems to fix it
See #11567.
Furthermore, it renames pythonPackages.dbus to pythonPackages.dbus-
python as that's the name upstream uses.
There is a small rebuild but I couldn't figure out the actual cause.