diff --git a/pkgs/applications/audio/carla/default.nix b/pkgs/applications/audio/carla/default.nix
index 26a5eab3b2e7..74a84e2a8dc6 100644
--- a/pkgs/applications/audio/carla/default.nix
+++ b/pkgs/applications/audio/carla/default.nix
@@ -21,11 +21,8 @@
 , wrapQtAppsHook ? null
 }:
 
-assert withFrontend -> python3Packages ? pyqt5;
 assert withQt -> qtbase != null;
 assert withQt -> wrapQtAppsHook != null;
-assert withGtk2 -> gtk2 != null;
-assert withGtk3 -> gtk3 != null;
 
 stdenv.mkDerivation rec {
   pname = "carla";