Gtk+ themes

[Fabian Harfert]

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