diff --git a/build-images b/build-images
index f80798f..dd2c7bf 100755
--- a/build-images
+++ b/build-images
@@ -65,7 +65,7 @@ checksum_and_publish() {
 
 
 # Start afresh, manifest-wise:
-rm -f $MANIFEST
+rm -f "$MANIFEST"
 
 # We might need to descend into different directories, subshells are
 # a way to do that: