diff --git a/pkgs/development/python-modules/wiffi/default.nix b/pkgs/development/python-modules/wiffi/default.nix
index 1a600ed76375..ff2d6025069d 100644
--- a/pkgs/development/python-modules/wiffi/default.nix
+++ b/pkgs/development/python-modules/wiffi/default.nix
@@ -3,12 +3,13 @@
   aiohttp,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "wiffi";
   version = "1.1.2";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "mampfes";
@@ -17,7 +18,9 @@ buildPythonPackage rec {
     hash = "sha256-pnbzJxq8K947Yg54LysPPho6IRKf0cc+szTETgyzFao=";
   };
 
-  propagatedBuildInputs = [ aiohttp ];
+  build-system = [ setuptools ];
+
+  dependencies = [ aiohttp ];
 
   # Project has no tests
   doCheck = false;