diff --git a/cook.sh b/cook.sh
index 46988913664897d6f9e8536e3638b9d05465f46f..b7c3fb9c84034666e9cda7642acae43dd8957eee 100755
--- a/cook.sh
+++ b/cook.sh
@@ -1,5 +1,6 @@
 #!/usr/bin/env bash
 set -e
+shopt -s nullglob
 
 source config.sh