diff --git a/development.md b/development.md
index db99e3e..bb4a70c 100644
--- a/development.md
+++ b/development.md
@@ -18,6 +18,7 @@ make dev
 
 ```bash
 cd backend
+make stack2nix-output.nix ## sets up dependencies (only has to be done once)
 nix-shell
 make dev ## starts ghcid
 ```