diff --git a/pkgs/development/python-modules/whichcraft/default.nix b/pkgs/development/python-modules/whichcraft/default.nix
index 407c431512af..bc48ee9a5155 100644
--- a/pkgs/development/python-modules/whichcraft/default.nix
+++ b/pkgs/development/python-modules/whichcraft/default.nix
@@ -2,19 +2,22 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   pytest,
 }:
 
 buildPythonPackage (finalAttrs: {
   pname = "whichcraft";
   version = "0.6.1";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
     sha256 = "11yfkzyplizdgndy34vyd5qlmr1n5mxis3a3svxmx8fnccdvknxc";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytest ];
 
   checkPhase = ''