diff --git a/testing/gtk4.0/gtk4.0.post-install b/testing/gtk4.0/gtk4.0.post-install
index cca0f096ba0..065f50fab0f 100644
--- a/testing/gtk4.0/gtk4.0.post-install
+++ b/testing/gtk4.0/gtk4.0.post-install
@@ -1,5 +1,6 @@
 #!/bin/sh
 
+mkdir -p etc/gtk-4.0
 usr/bin/gtk-query-immodules-4.0 > etc/gtk-4.0/gtk.immodules
 usr/bin/gdk-pixbuf-query-loaders > etc/gtk-4.0/gdk-pixbuf.loaders