diff --git a/hack/verify-fmt.sh b/hack/verify-fmt.sh
index edfd679..a3ba46c 100755
--- a/hack/verify-fmt.sh
+++ b/hack/verify-fmt.sh
@@ -1,7 +1,6 @@
 #!/usr/bin/env bash
 
 cp $1 $1.bak
-./hack/fmt.sh $1
+./hack/fmt.sh $1.bak
 
-diff -c $1 $1.bak
-rm $1.bak
+diff -c $1 $1.bak && rm $1.bak