Comment 11 for bug 1715722

Jeremy, you seem quite not listening to the advice we are giving to you, which is a maintainable solution to us. We told you multiple times we were happy to integrate what we think is a good solution from our perspective but you are not listening to those and seem like forcing your patch on us. This isn't how cooperation works.
In addition, your unwillingness to even start discussing/thinking about an upstream solution which isn't much more work than the override makes me fear that we'll keep that specific patch for one derative forever.
Also, you will understand that proposing a patch obviously broken, and such without testing it first doesn't really give confidence you will follow on a better solution rather that quick hack.

Alternatives aren't something which is good to take at that time of the release. I wanted a second option and Laney seemed to agree with me as we discussed on IRC.

As solutions:
* Laney suggested that if that's really a temporary solution (as you might agree to work on a more long term solution), dpkg-divert is a better idea. I'm happy to ease that for you so that people can still select the ubuntu session by symlink gdm3.css to ubuntu.css in our gnome-shell package. You can then dpkg-divert it and install your own gdm3.css from your theme package (is your package in ubuntu itself btw?). How does that sound? That way, you will get in the same state than the one before we changed gnome-shell.css by gdm3.css.
* The other solution, which is the more long term approach is to change for a gsettings key to select the theme.