Needed to fix the error on NixOS:
GLib-GIO-ERROR **: No GSettings schemas are installed on the system
See https://github.com/NixOS/nixpkgs/issues/16285
Reviewed-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>
Tested-by: Rodrigo Arias Mallo <rodrigo.arias@bsc.es>