diff --git a/pkgs/development/python-modules/sievelib/default.nix b/pkgs/development/python-modules/sievelib/default.nix
index 7b478df61fe4..6d1534a68d73 100644
--- a/pkgs/development/python-modules/sievelib/default.nix
+++ b/pkgs/development/python-modules/sievelib/default.nix
@@ -5,12 +5,13 @@
 , pytestCheckHook
 , pythonOlder
 , setuptools-scm
+, typing-extensions
 }:
 
 buildPythonPackage rec {
   pname = "sievelib";
   version = "1.4.0";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.7";
 
@@ -23,6 +24,10 @@ buildPythonPackage rec {
     setuptools-scm
   ];
 
+  dependencies = [
+    typing-extensions
+  ];
+
   nativeCheckInputs = [
     mock
     pytestCheckHook