diff --git a/pkgs/development/python-modules/fields/default.nix b/pkgs/development/python-modules/fields/default.nix
index fa15f987657e..065949f88545 100644
--- a/pkgs/development/python-modules/fields/default.nix
+++ b/pkgs/development/python-modules/fields/default.nix
@@ -2,18 +2,21 @@
   buildPythonPackage,
   lib,
   fetchPypi,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "fields";
   version = "5.0.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-MdSqA9jUTjXfE8Qx3jUTaZfwR6kkpZfYT3vCCeG+Vyc=";
   };
 
+  build-system = [ setuptools ];
+
   pythonImportsCheck = [ "fields" ];
 
   meta = {