diff --git a/pkgs/development/python-modules/arpy/default.nix b/pkgs/development/python-modules/arpy/default.nix
index c349f5ceb9f8..f4dc4ca11a1a 100644
--- a/pkgs/development/python-modules/arpy/default.nix
+++ b/pkgs/development/python-modules/arpy/default.nix
@@ -2,21 +2,26 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  setuptools,
   unittestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "arpy";
   version = "2.3.0";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchFromGitHub {
     owner = "viraptor";
     repo = "arpy";
-    rev = version;
+    tag = finalAttrs.version;
     hash = "sha256-jD1XJJhcpJymn0CwZ65U06xLKm1JjHffmx/umEO7a5s=";
   };
 
+  build-system = [ setuptools ];
+
   checkInputs = [ unittestCheckHook ];
 
   pythonImportsCheck = [ "arpy" ];
@@ -27,4 +32,4 @@ buildPythonPackage rec {
     license = lib.licenses.bsd2;
     maintainers = with lib.maintainers; [ thornycrackers ];
   };
-}
+})