diff --git a/pkgs/development/python-modules/g2pkk/default.nix b/pkgs/development/python-modules/g2pkk/default.nix
index c1b5d2992097..a8799b75e2ec 100644
--- a/pkgs/development/python-modules/g2pkk/default.nix
+++ b/pkgs/development/python-modules/g2pkk/default.nix
@@ -2,6 +2,7 @@
   lib,
   buildPythonPackage,
   fetchPypi,
+  setuptools,
   jamo,
   nltk,
 }:
@@ -9,14 +10,20 @@
 buildPythonPackage (finalAttrs: {
   pname = "g2pkk";
   version = "0.1.2";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
     inherit (finalAttrs) pname version;
     hash = "sha256-YarV1Btn1x3Sm4Vw/JDSyJy3ZJMXAQHZJJJklSG0R+Q=";
   };
 
-  propagatedBuildInputs = [
+  build-system = [
+    setuptools
+  ];
+
+  dependencies = [
     jamo
     nltk
   ];