diff --git a/build-stream b/build-stream
index 72a5ff9..1706cf0 100755
--- a/build-stream
+++ b/build-stream
@@ -1,5 +1,9 @@
 #!/usr/bin/env python3
 
+'''
+TODO factor this out with the ./build-buildroot setup which is more advanced.
+'''
+
 import os
 import shutil