--- a/hotspot/make/defs.make	Mon Feb 13 02:29:22 2012 -0800
+++ b/hotspot/make/defs.make	Mon Feb 13 04:30:59 2012 -0800
@@ -193,6 +193,9 @@
 
 # Default jdk image if one is created for you with create_jdk
 JDK_IMAGE_DIR=$(OUTPUTDIR)/jdk-$(PLATFORM)
+ifneq ($(ALT_JDK_IMAGE_DIR),)
+  JDK_IMAGE_DIR=$(ALT_JDK_IMAGE_DIR)
+endif
 
 # The platform dependent defs.make defines platform specific variable such 
 # as ARCH, EXPORT_LIST etc. We must place the include here after BOOTDIR is defined.