diff --git a/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh b/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
index c8b5bf2e61a..0541ca1ba62 100644
--- a/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
+++ b/nixos/modules/system/boot/loader/raspberrypi/raspberrypi-builder.sh
@@ -1,4 +1,7 @@
-#! @bash@/bin/sh -e
+#! @bash@/bin/sh
+
+# This can end up being called disregarding the shebang.
+set -e
 
 shopt -s nullglob