diff --git a/pkgs/development/python-modules/shutilwhich/default.nix b/pkgs/development/python-modules/shutilwhich/default.nix
index 329312e135c3..ecaebe4f935b 100644
--- a/pkgs/development/python-modules/shutilwhich/default.nix
+++ b/pkgs/development/python-modules/shutilwhich/default.nix
@@ -2,13 +2,14 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   pytest,
 }:
 
 buildPythonPackage rec {
   pname = "shutilwhich";
   version = "1.1.0";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "mbr";
@@ -17,6 +18,8 @@ buildPythonPackage rec {
     sha256 = "05fwcjn86w8wprck04iv1zccfi39skdf0lhwpb4b9gpvklyc9mj0";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytest ];
 
   checkPhase = ''