python3Packages.vpk: migrate to pyproject

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

@@ -2,13 +2,14 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "vpk";
   version = "1.4.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "ValvePython";
@@ -17,6 +18,8 @@ buildPythonPackage rec {
     hash = "sha256-SPkPb8kveAR2cN9kd2plS+TjmBYBCfa6pJ0c22l69M0=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   meta = {