install fennel from source as a package

nixos lua packaging is giving me a headache

pkgs/fennel/default.nix

@@ -0,0 +1,19 @@
+{
+  stdenv
+, lua
+, fetchFromSourcehut
+}:
+let pname =  "fennel";
+in stdenv.mkDerivation {
+  inherit pname;
+  version = "1.3";
+  nativeBuildInputs = [ lua ];  # used in build
+  buildInputs = [ lua ];        # needed for patchShebangs
+  src = fetchFromSourcehut {
+    owner = "~technomancy";
+    repo = pname;
+    rev = "1.3.0";
+    hash = "sha256-DXJOdYzfjTncqL7BsDbdvZcauDMkZV2X0U0FfhfwQrw=";
+  };
+  makeFlags = [ "PREFIX=${placeholder "out"}" ];
+}