diff --git a/TODO b/TODO
new file mode 100644
index 00000000..e69de29b
diff --git a/shell.nix b/shell.nix
index bb3ffc4c..81c44299 100644
--- a/shell.nix
+++ b/shell.nix
@@ -1,5 +1,5 @@
 { pkgs ? import <nixpkgs> {} }:
 with pkgs;
 mkShell {
-  buildInputs = with python3Packages; [ Mako requests wabt ];
+  buildInputs = with python3Packages; [ Mako requests wabt todo-txt-cli ];
 }