diff --git a/pkgs/development/python-modules/dehinter/default.nix b/pkgs/development/python-modules/dehinter/default.nix
index 21eba3ec6309..221c4e226d12 100644
--- a/pkgs/development/python-modules/dehinter/default.nix
+++ b/pkgs/development/python-modules/dehinter/default.nix
@@ -4,12 +4,13 @@
   fetchFromGitHub,
   fonttools,
   pytestCheckHook,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "dehinter";
   version = "4.0.0";
-  format = "setuptools";
+  pyproject = true;
 
   # PyPI source tarballs omit tests, fetch from Github instead
   src = fetchFromGitHub {
@@ -19,6 +20,8 @@ buildPythonPackage rec {
     hash = "sha256-l988SW6OWKXzJK0WGAJZR/QDFvgnSir+5TwMMvFcOxg=";
   };
 
+  build-system = [ setuptools ];
+
   propagatedBuildInputs = [ fonttools ];
 
   nativeCheckInputs = [ pytestCheckHook ];