diff --git a/pkgs/desktops/gnome/extensions/update-extensions.py b/pkgs/desktops/gnome/extensions/update-extensions.py
index 29139723c8d4..ef60f36812ec 100755
--- a/pkgs/desktops/gnome/extensions/update-extensions.py
+++ b/pkgs/desktops/gnome/extensions/update-extensions.py
@@ -336,7 +336,7 @@ def find_collisions(
             if shell_version in extension["shell_version_map"]:
                 package_name_registry.setdefault(pname, set()).add(uuid)
     return {
-        pname: list(uuids)
+        pname: sorted(uuids)
         for pname, uuids in package_name_registry.items()
         if len(uuids) > 1
     }