diff --git a/pkgs/development/python-modules/ansicolors/default.nix b/pkgs/development/python-modules/ansicolors/default.nix
index 2fab28de72c3..af1bd62df511 100644
--- a/pkgs/development/python-modules/ansicolors/default.nix
+++ b/pkgs/development/python-modules/ansicolors/default.nix
@@ -3,12 +3,13 @@
   buildPythonPackage,
   fetchPypi,
   pytest,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "ansicolors";
   version = "1.1.8";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
@@ -16,6 +17,8 @@ buildPythonPackage rec {
     sha256 = "99f94f5e3348a0bcd43c82e5fc4414013ccc19d70bd939ad71e0133ce9c372e0";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytest ];
 
   checkPhase = ''