diff --git a/pkgs/development/python-modules/python3-gnutls/default.nix b/pkgs/development/python-modules/python3-gnutls/default.nix
index 72f695326d75..abd08b9f55b1 100644
--- a/pkgs/development/python-modules/python3-gnutls/default.nix
+++ b/pkgs/development/python-modules/python3-gnutls/default.nix
@@ -1,10 +1,10 @@
 { lib, fetchFromGitHub, substituteAll, buildPythonPackage, isPy3k, gnutls
-, twisted, pyopenssl, service-identity }:
+, twisted, pyopenssl, service-identity, setuptools }:
 
 buildPythonPackage rec {
   pname = "python3-gnutls";
   version = "3.1.9";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = !isPy3k;
 
@@ -15,6 +15,8 @@ buildPythonPackage rec {
     hash = "sha256-18T8bAHlNERHobsspUFvSC6ulN55nrFFb5aqNwU8T00=";
   };
 
+  nativeBuildInputs = [ setuptools ];
+
   propagatedBuildInputs = [ twisted pyopenssl service-identity ];
 
   patches = [