python3Packages.dateutils: migrate to pyproject

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

@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   python-dateutil,
   pytz,
 }:
@@ -9,14 +10,16 @@
 buildPythonPackage rec {
   pname = "dateutils";
   version = "0.6.12";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-A92QvLIVQb1OtLATY35PG1+USIHEbMbktnpgWeNw4/E=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     python-dateutil
     pytz
   ];