diff --git a/pkgs/development/python-modules/policy-sentry/default.nix b/pkgs/development/python-modules/policy-sentry/default.nix
index 19cfbf29192c..09e909eaa142 100644
--- a/pkgs/development/python-modules/policy-sentry/default.nix
+++ b/pkgs/development/python-modules/policy-sentry/default.nix
@@ -1,19 +1,21 @@
-{ lib
-, beautifulsoup4
-, buildPythonPackage
-, click
-, fetchFromGitHub
-, pytestCheckHook
-, pythonOlder
-, pyyaml
-, requests
-, schema
+{
+  lib,
+  beautifulsoup4,
+  buildPythonPackage,
+  click,
+  fetchFromGitHub,
+  pytestCheckHook,
+  pythonOlder,
+  pyyaml,
+  requests,
+  schema,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "policy-sentry";
-  version = "0.12.10";
-  format = "setuptools";
+  version = "0.12.12";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -21,10 +23,12 @@ buildPythonPackage rec {
     owner = "salesforce";
     repo = "policy_sentry";
     rev = "refs/tags/${version}";
-    hash = "sha256-Kha5fq5l1yXWjDZq9GFKk3gYRtrEyiCFjbEAdYGPSa8=";
+    hash = "sha256-1LYcUlGoSalbdo4tiNIYbdA04IHRTImhdWScpiCZk50=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     beautifulsoup4
     click
     requests
@@ -32,20 +36,16 @@ buildPythonPackage rec {
     schema
   ];
 
-  nativeCheckInputs = [
-    pytestCheckHook
-  ];
+  nativeCheckInputs = [ pytestCheckHook ];
 
-  pythonImportsCheck = [
-    "policy_sentry"
-  ];
+  pythonImportsCheck = [ "policy_sentry" ];
 
   meta = with lib; {
     description = "Python module for generating IAM least privilege policies";
-    mainProgram = "policy_sentry";
     homepage = "https://github.com/salesforce/policy_sentry";
     changelog = "https://github.com/salesforce/policy_sentry/releases/tag/${version}";
     license = licenses.bsd3;
     maintainers = with maintainers; [ fab ];
+    mainProgram = "policy_sentry";
   };
 }