python3Packages.arpeggio: migrate to pyproject (#528218)

pkgs/development/python-modules/arpeggio/default.nix

@@ -3,19 +3,24 @@
   buildPythonPackage,
   fetchPypi,
   pytestCheckHook,
+  setuptools,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "arpeggio";
   version = "2.0.3";
-  format = "setuptools";
+  pyproject = true;
+
+  __structuredAttrs = true;
 
   src = fetchPypi {
     pname = "Arpeggio";
-    inherit version;
+    inherit (finalAttrs) version;
     hash = "sha256-noWtNc/GyThnaBfHrpoQAKfHKjTHHbDGhxNsRg0SuF4=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   pythonImportsCheck = [ "arpeggio" ];
@@ -26,4 +31,4 @@ buildPythonPackage rec {
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ nickcao ];
   };
-}
+})