diff --git a/leptos/flake.nix b/leptos/flake.nix
index 926a609..6d82537 100644
--- a/leptos/flake.nix
+++ b/leptos/flake.nix
@@ -90,6 +90,7 @@
               binaryen # required for release compilation
               myPkgs.leptosfmt
               stylance-cli # bundle sass
+              wasm-pack # to test wasm
             ];
           };
       }