python3Packages.xstatic-bootstrap: migrate to pyproject

pkgs/development/python-modules/xstatic-bootstrap/default.nix

@@ -2,12 +2,13 @@
   buildPythonPackage,
   lib,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "xstatic-bootstrap";
   version = "5.3.8.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     pname = "xstatic_bootstrap";
@@ -15,6 +16,8 @@ buildPythonPackage rec {
     hash = "sha256-BPXMlbvlQ40ehR0GxMoa1/hL02oJtN5aH1S1JOhQaFk=";
   };
 
+  build-system = [ setuptools ];
+
   # no tests implemented
   doCheck = false;