Index: tweetnacl/Makefile
==================================================================
--- tweetnacl/Makefile
+++ tweetnacl/Makefile
@@ -10,19 +10,21 @@
 
 tweetnacl.c: tweetnacl.c.new tweetnacl.h.new patches/tweetnacl-supercop.diff patches/tweetnacl-derivepubkey.diff
 	rm -f tweetnacl.c tweetnacl.h
 	patch -p1 < patches/tweetnacl-supercop.diff || ( rm -f tweetnacl.c.new tweetnacl.h.new; exit 1 )
 	patch -p1 < patches/tweetnacl-derivepubkey.diff || ( rm -f tweetnacl.c.new tweetnacl.h.new; exit 1 )
+	rm -f tweetnacl.c.new.orig tweetnacl.h.new.orig
 	mv tweetnacl.h.new tweetnacl.h
 	mv tweetnacl.c.new tweetnacl.c
 
 tweetnacl.h: tweetnacl.c
 
 tweetnacl.o: tweetnacl.c tweetnacl.h
 	$(CC) $(CPPFLAGS) $(CFLAGS) -DSUPERCOP=1 -I../blake2b/ -o tweetnacl.o -c tweetnacl.c
 
 clean:
+	rm -f tweetnacl.c.new.orig tweetnacl.h.new.orig
 	rm -f tweetnacl.h.new tweetnacl.h
 	rm -f tweetnacl.c.new tweetnacl.c
 	rm -f tweetnacl.o
 
 distclean: clean