Hi! Looking into this source file I found out that it would make it possible to support Gtk+ themes out of the box, if the environment variable GTK_DATA_PREFIX is set to the base directory of the user's profile (e.g. /home/rms/.guix_profile/). I tried it with lxapearance and it seems to work. The problem Mark mentioned on IRC is that this can't contain multiple directories. But looking at the sources (e.g. https://git.gnome.org/browse/gtk+/tree/gtk/gtkcssprovider.c, line 2071) this seems to be the only opportunity to set this. Any ideas? Maybe there's a better option, I don't know.
Fabian
