diff --git a/cmk.sh b/cmk.sh
index 4e4b53af0..bca12ca80 100755
--- a/cmk.sh
+++ b/cmk.sh
@@ -92,6 +92,7 @@ echo "in "$PWD
 
 #cmake
 if [ $REBUILD -eq 1 ]; then
+	rm -f CMakeCache.txt
 	BUILDCOMMAND="$CMAKE_PRE cmake $CMAKE_POST .."
 	echo $BUILDCOMMAND
 	eval $BUILDCOMMAND