--- a/Makefile	Mon May 05 22:48:21 2014 +0200
+++ b/Makefile	Tue May 06 16:09:49 2014 +0200
@@ -1,7 +1,12 @@
 IMAGES = procs.pdf routing.pdf
 ALL = mk2014.pdf
+.PHONY: clean
 
 all:		$(ALL)
+clean:
+	rubber -d --clean mk2014.tex
+	-rm -f *.vrb $(IMAGES)
+
 mk2014.pdf:	$(IMAGES)
 
 %.pdf:	%.tex