diff --git a/src/nix/bundle.md b/src/nix/bundle.md
index c183a170d..5e2298376 100644
--- a/src/nix/bundle.md
+++ b/src/nix/bundle.md
@@ -29,4 +29,8 @@ for more details.
 >
 > This command only works on Linux.
 
+# Bundler definitions
+
+TODO
+
 )""