Index: Makefile
==================================================================
--- Makefile
+++ Makefile
@@ -15,11 +15,11 @@
 EXTRA_CFLAGS += -Dsys_call_table_addr="((void**)0x$(SCT))"
 ifdef SCT32
 EXTRA_CFLAGS += -Dia32_sys_call_table_addr="((void**)0x$(SCT32))" -D__enable_32bits_support
 endif
 else
-include Makefile.inc
+-include Makefile.inc
 endif
 
 all:
 	@echo "Building with " $(EXTRA_CFLAGS)
 	make -C '$(KERNEL_DIR)' 'M=$(PWD)'
@@ -27,10 +27,11 @@
 install: all
 	-mkdir -p '$(DESTDIR)/lib/modules/$(KERNEL_VER)/misc'
 	cp nokeyctl.ko '$(DESTDIR)/lib/modules/$(KERNEL_VER)/misc/'
 
 clean:
-	make -C '$(KERNEL_DIR)' 'M=$(PWD)' clean
-	rm -f Module.symvers built-in.o modules.order nokeyctl.ko nokeyctl.mod.c nokeyctl.mod.o nokeyctl.o
+	-make -C '$(KERNEL_DIR)' 'M=$(PWD)' clean
+	rm -f Module.symvers built-in.o modules.order nokeyctl.ko nokeyctl.mod.c nokeyctl.mod.o nokeyctl.o .built-in.o.cmd .nokeyctl.ko.cmd .nokeyctl.mod.o.cmd .nokeyctl.o.cmd
+	rm -rf .tmp_versions
 
 distclean: clean
 	rm -f Makefile.inc