diff --git a/contrib/jenkins-build-common.sh b/contrib/jenkins-build-common.sh
index a5b34af..39046ef 100644
--- a/contrib/jenkins-build-common.sh
+++ b/contrib/jenkins-build-common.sh
@@ -56,7 +56,8 @@
 env | grep -v "^LESS" | sort
 
 # clean the workspace
-rm -f "$base"/*.build-*.{tgz,md5}
+rm -f "$base"/*.build-*.tgz
+rm -f "$base"/*.build-*.md5
 rm -rf "$prefix_real"
 mkdir -p "$prefix_real"