python3Packages.cppheaderparser: migrate to pyproject

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

@@ -3,12 +3,13 @@
   fetchPypi,
   ply,
   lib,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "cppheaderparser";
   version = "2.7.4";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     pname = "CppHeaderParser";
@@ -16,6 +17,8 @@ buildPythonPackage rec {
     hash = "sha256-OCswQW2VsKXoUCshSBDcrCpWQykX4mUUR9Or4lPjzEI=";
   };
 
+  build-system = [ setuptools ];
+
   propagatedBuildInputs = [ ply ];
 
   pythonImportsCheck = [ "CppHeaderParser" ];