diff --git a/tests/functional/flakes/eval-cache.sh b/tests/functional/flakes/eval-cache.sh
old mode 100644
new mode 100755
index 90c7abd3c..0f8df1b91
--- a/tests/functional/flakes/eval-cache.sh
+++ b/tests/functional/flakes/eval-cache.sh
@@ -1,3 +1,5 @@
+#!/usr/bin/env bash
+
 source ./common.sh
 
 requireGit