diff --git a/pkgs/development/python-modules/interegular/default.nix b/pkgs/development/python-modules/interegular/default.nix
index cc5a193a52c8..b5eabd8f39f3 100644
--- a/pkgs/development/python-modules/interegular/default.nix
+++ b/pkgs/development/python-modules/interegular/default.nix
@@ -2,17 +2,21 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "interegular";
   version = "0.3.3";
-  format = "setuptools";
+  pyproject = true;
+
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-2baXshs0iEcROZug8DdpFLgYmc5nADJIbQ0Eg0SnZgA=";
   };
 
+  build-system = [ setuptools ];
+
   pythonImportsCheck = [ "interegular" ];
 
   meta = {