diff --git a/flake.nix b/flake.nix
index 239623b..57bf38f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -20,6 +20,7 @@
     in pkgs.mkShell {
       buildInputs = with pkgs; [
         cargo
+        rustfmt
         wasm-bindgen-cli
         trunk
         nodePackages.sass