diff --git a/pkgs/development/python-modules/serpent/default.nix b/pkgs/development/python-modules/serpent/default.nix
index f6ddf5540703..9a1708593f32 100644
--- a/pkgs/development/python-modules/serpent/default.nix
+++ b/pkgs/development/python-modules/serpent/default.nix
@@ -1,25 +1,27 @@
 {
   lib,
+  attrs,
   buildPythonPackage,
   fetchPypi,
-  isPy27,
-  enum34,
-  attrs,
-  pytz,
   pytestCheckHook,
+  pythonOlder,
+  pytz,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "serpent";
   version = "1.41";
-  format = "setuptools";
+  pyproject = true;
+
+  disabled = pythonOlder "3.9";
 
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-BAcDX+PGZEOH1Iz/FGfVqp/v+BTQc3K3hnftDuPtcJU=";
   };
 
-  propagatedBuildInputs = lib.optionals isPy27 [ enum34 ];
+  build-system = [ setuptools ];
 
   nativeCheckInputs = [
     attrs
@@ -27,9 +29,12 @@ buildPythonPackage rec {
     pytestCheckHook
   ];
 
+  pythonImportsCheck = [ "serpent" ];
+
   meta = with lib; {
     description = "Simple serialization library based on ast.literal_eval";
     homepage = "https://github.com/irmen/Serpent";
+    changelog = "https://github.com/irmen/Serpent/releases/tag/serpent-${version}";
     license = licenses.mit;
     maintainers = with maintainers; [ prusnak ];
   };