--- a/configure.ac	2023-03-15 18:28:17.000000000 +0100
+++ b/configure.ac	2026-10-19 18:43:24.970861447 +0200
@@ -388,7 +388,8 @@ if test x$enable_gconf != xno; then
 
 fi
 
-AM_GCONF_SOURCE_2
+m4_ifdef([AM_GCONF_SOURCE_2], [AM_GCONF_SOURCE_2],
+  [AM_CONDITIONAL(GCONF_SCHEMAS_INSTALL, false)])
 
 AM_CONDITIONAL(ENABLE_SCHEMAS, test x$enable_gconf != xno)