diff --git a/flake.nix b/flake.nix
index 2f75e07..df6b1f4 100644
--- a/flake.nix
+++ b/flake.nix
@@ -34,8 +34,6 @@
           export EM_CACHE=$PWD/.emscripten_cache
           cp -r ${pkgs.emscripten}/share/emscripten/cache $EM_CACHE
           chmod u+rwX -R $EM_CACHE
-
-          function makejs { make -f Makefile.js $@; }
         '';
       };
   };
diff --git a/makejs b/makejs
new file mode 100755
index 0000000..08aa9e6
--- /dev/null
+++ b/makejs
@@ -0,0 +1,2 @@
+#!/usr/bin/env bash
+make -f Makefile.js $@