add explicit xulrunner
diff --git a/releng/maps/build.cfg b/releng/maps/build.cfg
index 5bb415d..bd54976 100644
--- a/releng/maps/build.cfg
+++ b/releng/maps/build.cfg
@@ -1,7 +1,7 @@
 #builderVersion=v200911110814
 #builderVersion=v200911151844
 #builderVersion=v200911181631
-builderVersion=v200911190045
+builderVersion=v200911190220
 
 eclipse.builder=org.eclipse.releng.basebuilder
 eclipse.builder.version=R36_M2