--- a/stage4/Makefile	Fri Apr 01 11:10:06 2011 +0200
+++ b/stage4/Makefile	Mon Apr 04 13:25:39 2011 +0200
@@ -10,7 +10,7 @@
 
 clean:
 	rm -f *.o
-	find . -depth -mindepth 2 -maxdepth 2 -name Makefile -printf %h\\n | xargs -i make -C{} $@
+	find . -depth -mindepth 2 -maxdepth 2 -name Makefile | sed 's/Makefile//g' | xargs -I {} make -C{} clean
 
 
 CXXFLAGS += -I. -I../*