I just found out about wrapGAppsHook by examining a gnome package, but there really should be documentation about this in the Nixpkgs User Guide (a section about Gnome would be nice, which would show the right way to package GTK3 / GTK2 glib based apps).

Also, perhaps there are other things I missed that one should know when packaging Gnome Applications or GTK3/2 apps?

/cc @lethalman @jgeerds @DamienCassou Gnome maintainers