diff --git a/pkgs/development/python-modules/variants/default.nix b/pkgs/development/python-modules/variants/default.nix
index bd8f044b57f6..eb0f2cf11300 100644
--- a/pkgs/development/python-modules/variants/default.nix
+++ b/pkgs/development/python-modules/variants/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   pytestCheckHook,
   setuptools-scm,
   six,
@@ -10,14 +11,17 @@
 buildPythonPackage rec {
   pname = "variants";
   version = "0.2.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
     hash = "sha256-UR91tM90g8J+TYbZrM8rUxcmeQDBZtF2Nr7u0RiSm5A=";
   };
 
-  nativeBuildInputs = [ setuptools-scm ];
+  build-system = [
+    setuptools
+    setuptools-scm
+  ];
 
   nativeCheckInputs = [
     pytestCheckHook