diff --git a/mozilla/extensions/java/xpcom/Makefile.in b/mozilla/extensions/java/xpcom/Makefile.in
index 5afc4d730da..fcb1faf79f8 100644
--- a/mozilla/extensions/java/xpcom/Makefile.in
+++ b/mozilla/extensions/java/xpcom/Makefile.in
@@ -52,5 +52,9 @@ TOOL_DIRS = \
 
 include $(topsrcdir)/config/rules.mk
 
+libs::
+	@echo WARNING: temporary. remove next line.
+	rm -rf src/org interfaces/org
+
 tools::
 	$(MAKE) -C src jarfile