python3Packages.vpk: migrate to pyproject (#532018)

pkgs/development/python-modules/vpk/default.nix

@@ -2,23 +2,30 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   pytestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "vpk";
   version = "1.4.0";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "ValvePython";
     repo = "vpk";
-    rev = "v${version}";
+    tag = "v${finalAttrs.version}";
     hash = "sha256-SPkPb8kveAR2cN9kd2plS+TjmBYBCfa6pJ0c22l69M0=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
+  pythonImportsCheck = [ "vpk" ];
+
   meta = {
     description = "Library for working with Valve Pak files";
     mainProgram = "vpk";
@@ -26,4 +33,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = [ ];
   };
-}
+})