diff --git a/tools/chrootmake.sh b/tools/chrootmake.sh
index a86825a61..22b2e1d5f 100755
--- a/tools/chrootmake.sh
+++ b/tools/chrootmake.sh
@@ -21,4 +21,4 @@ if [ $MAKEMAP -ne 0 ]; then
 fi
 make clean
 make cleandepend
-find . -name obj-ack -type d|xargs rm -rf
+find . -name 'obj-*' -type d|xargs rm -rf