python3Packages.prometheus-client: add nix-update-script

pkgs/development/python-modules/prometheus-client/default.nix

@@ -8,6 +8,7 @@
   twisted,
   pytest-benchmark,
   pytestCheckHook,
+  nix-update-script,
 }:
 
 buildPythonPackage (finalAttrs: {
@@ -45,6 +46,8 @@ buildPythonPackage (finalAttrs: {
     "test_instance_ip_grouping_key"
   ];
 
+  passthru.updateScript = nix-update-script { };
+
   meta = {
     description = "Prometheus instrumentation library for Python applications";
     homepage = "https://github.com/prometheus/client_python";