diff --git a/cron-scripts/10-test.sh b/cron-scripts/10-test.sh
index c99c064..0ceb96d 100755
--- a/cron-scripts/10-test.sh
+++ b/cron-scripts/10-test.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!/usr/bin/env -S guix shell -- bash
 
 set -x
 
diff --git a/guix-template.scm b/guix-template.scm
index f744754..70f8ceb 100644
--- a/guix-template.scm
+++ b/guix-template.scm
@@ -18,7 +18,7 @@ ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAIFAUQBM+p7ET8XRQE+UN6wa9DxQTMWlqErny7URZRtKE
 "))
 
 (let ((output-port (open-file "/data/cronjob.sh" "w")))
-  (display "#!/usr/bin/env bash
+  (display "#!/usr/bin/env -S guix shell -- bash
 
 set -x