diff --git a/README.md b/README.md
index 17aebe6..30ff514 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,8 @@ design pattern.
 
 ## Open Problems
 
+* The current code overwrites `/etc/network/interfaces` -- this needs to be
+  improved.
 * The apt repository at http://bird.network.cz/debian/ does not use PGP
   signatures, so `bird` and `bird6` will not be installed automatically.
 * Setting the hostname should occur before everything else. So either