diff '--color=auto' -ur Carla-2.5.9.orig/source/bridges-ui/Makefile Carla-2.5.9/source/bridges-ui/Makefile
--- Carla-2.5.9.orig/source/bridges-ui/Makefile	2024-09-21 23:56:30.000000000 +0200
+++ Carla-2.5.9/source/bridges-ui/Makefile	2025-07-01 16:51:32.997614587 +0200
@@ -69,8 +69,12 @@
 
 # ---------------------------------------------------------------------------------------------------------------------
 
+ifeq ($(HAVE_GTK2),true)
 TARGETS += ui_lv2-gtk2
+endif
+ifeq ($(HAVE_GTK3),true)
 TARGETS += ui_lv2-gtk3
+endif
 
 ifneq ($(MACOS_OR_WINDOWS),true)
 ifeq ($(HAVE_QT4),true)