The fix is merely a workaround - essentially, the code is wrong.

It only does from gi.repository import Gtk - but without specifying what version of Gtk it wants to use.

so before the import, it should should do gi.require_version ('Gtk', '3.0')

(Otherwise, if typelib-1_0-Gtk-4_0 is also installed, the py code will pick a 'random one and still do the wrong thing.

If the code properly specifics this versioned dep, then the dep scanner should add typelib(Gtk) = 3.0 as dependency

Dominique Leuenberger (dimstar) - over 2 years ago

reviewer

   try:
        from gi import require_version

        require_version('PangoCairo', '1.0')
        require_version('Gtk', '3.0')
        require_version('Gdk', '3.0'

oh - they do require the right versions :( but with non-standard code which the dep scanner can't detect