diff --git a/subprojects/extensions-tool/src/command-pack.c b/subprojects/extensions-tool/src/command-pack.c
index c8d995006..f2cfcd51a 100644
--- a/subprojects/extensions-tool/src/command-pack.c
+++ b/subprojects/extensions-tool/src/command-pack.c
@@ -163,12 +163,16 @@ extension_pack_add_schemas (ExtensionPack  *pack,
         return FALSE;
     }
 
+#if MAJOR_VERSION >= 46
+#error "Outdated compatibility code, please remove"
+#else
   dstpath = g_file_get_path (dstdir);
   proc = g_subprocess_new (G_SUBPROCESS_FLAGS_STDERR_SILENCE, error,
                            "glib-compile-schemas", "--strict", dstpath, NULL);
 
   if (!g_subprocess_wait_check (proc, NULL, error))
     return FALSE;
+#endif
 
   g_hash_table_insert (pack->files,
                        g_strdup ("schemas"), g_steal_pointer (&dstdir));
diff --git a/subprojects/extensions-tool/src/meson.build b/subprojects/extensions-tool/src/meson.build
index a855fef97..f7bda8aff 100644
--- a/subprojects/extensions-tool/src/meson.build
+++ b/subprojects/extensions-tool/src/meson.build
@@ -1,6 +1,7 @@
 config_h = configuration_data()
 config_h.set_quoted('GETTEXT_PACKAGE', package_name)
 config_h.set_quoted('VERSION', meson.project_version())
+config_h.set('MAJOR_VERSION', meson.project_version().split('.')[0])
 config_h.set_quoted('LOCALEDIR', localedir)
 config_h.set('HAVE_BIND_TEXTDOMAIN_CODESET', cc.has_function('bind_textdomain_codeset'))
 configure_file(