python312Packages.viewstate: unbreak, switch to pyproject, run checks

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

@@ -1,16 +1,15 @@
 {
+  lib,
   buildPythonPackage,
   fetchFromGitHub,
-  isPy3k,
-  lib,
-  pytest,
+  poetry-core,
+  pytestCheckHook,
 }:
 
 buildPythonPackage rec {
   pname = "viewstate";
   version = "0.6.0";
-  format = "setuptools";
-  disabled = !isPy3k;
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "yuvadm";
@@ -19,11 +18,11 @@ buildPythonPackage rec {
     sha256 = "sha256-cXT5niE3rNdqmNqnITWy9c9/MF0gZ6LU2i1uzfOzkUI=";
   };
 
-  nativeCheckInputs = [ pytest ];
+  build-system = [ poetry-core ];
 
-  checkPhase = ''
-    pytest
-  '';
+  nativeCheckInputs = [
+    pytestCheckHook
+  ];
 
   meta = {
     description = ".NET viewstate decoder";