--- a/configure.ac	2019-09-18 20:01:29.244433451 +0200
+++ b/configure.ac	2019-09-18 20:06:01.479617139 +0200
@@ -185,6 +185,8 @@
 # Python
 ###########################
 
+AS_IF([test "x$with_gtk" = x2],
+        [
 PYGTK_REQUIRED=2.14.0
 PYGOBJECT_REQUIRED=0.22
 
@@ -207,6 +209,7 @@
 PYGTK_CODEGEN="$PYTHON `$PKG_CONFIG --variable=codegendir pygtk-2.0`/codegen.py"
 AC_SUBST(PYGTK_CODEGEN)
 AC_MSG_RESULT($PYGTK_CODEGEN)
+])
 
 #########################
 # Check if build tests