python3Packages.slh-dsa: fix build (#501442)

pkgs/development/python-modules/slh-dsa/default.nix

@@ -2,7 +2,10 @@
   lib,
   buildPythonPackage,
   fetchPypi,
-  pdm-backend,
+  setuptools,
+  mypy,
+  pytestCheckHook,
+  pytest-xdist,
 }:
 
 buildPythonPackage rec {
@@ -16,10 +19,25 @@ buildPythonPackage rec {
     hash = "sha256-p4eWMVayOFiEjFtlnsmmtH6HMfcIeYIpgdfjuB4mmAY=";
   };
 
-  build-system = [ pdm-backend ];
+  env.SLHDSA_BUILD_OPTIMIZED = "1";
+
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail '"mypy>=1.10.1",' ""
+  '';
+
+  build-system = [
+    setuptools
+    mypy
+  ];
 
   pythonImportsCheck = [ "slhdsa" ];
 
+  nativeCheckInputs = [
+    pytestCheckHook
+    pytest-xdist
+  ];
+
   meta = {
     description = "Pure Python implementation of the SLH-DSA algorithm";
     homepage = "https://github.com/colinxu2020/slhdsa";