--- mozilla-1.9.1/extensions/java/xpcom/Makefile.in~	2009-07-30 12:30:15.000000000 -0300
+++ mozilla-1.9.1/extensions/java/xpcom/Makefile.in	2009-09-03 05:10:19.000000000 -0300
@@ -47,6 +47,9 @@
 DIRS += tests
 endif
 
+# javac may exhaust resources when building in a multi-cpu machine (e.g. klodia)
+MAKE := $(MAKE) -j1
+
 include $(topsrcdir)/config/rules.mk
 
 # Build the implementation Java classes