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.
https://projecthamster.wordpress.com/
Note that because it is invoked via dbus, you have to properly install
it and logout/login for the thing to work (you cannot run it directly
from the nix store).