openttd-nml: embed and check version

pkgs/by-name/op/openttd-nml/package.nix

@@ -2,6 +2,7 @@
   lib,
   fetchFromGitHub,
   python3,
+  versionCheckHook,
 }:
 
 python3.pkgs.buildPythonApplication (finalAttrs: {
@@ -16,10 +17,18 @@ python3.pkgs.buildPythonApplication (finalAttrs: {
     hash = "sha256-swAkUhduIhcfbAvKsPaJNBXcv8T6GDaxk3KKLLa9GQ8=";
   };
 
+  postPatch = ''
+    echo 'version = "${finalAttrs.version}"' > nml/__version__.py
+  '';
+
   propagatedBuildInputs = with python3.pkgs; [
     pillow
   ];
 
+  nativeInstallCheckInputs = [ versionCheckHook ];
+
+  doInstallCheck = true;
+
   meta = {
     homepage = "http://openttdcoop.org/";
     description = "Compiler for OpenTTD NML files";