-# Create the LUFA source path variables by including the LUFA root makefile
-include $(TOP_DIR)/$(LUFA_PATH)/LUFA/makefile
+# Create the LUFA source path variables by including the LUFA makefile
+ifneq (, $(wildcard $(TOP_DIR)/$(LUFA_PATH)/LUFA/Build/lufa_sources.mk))
+ # New build system from 20120730
+ LUFA_ROOT_PATH = $(LUFA_PATH)/LUFA
+ include $(TOP_DIR)/$(LUFA_PATH)/LUFA/Build/lufa_sources.mk
+else
+ include $(TOP_DIR)/$(LUFA_PATH)/LUFA/makefile
+endif