diff --git a/pkgs/development/python-modules/pykakasi/default.nix b/pkgs/development/python-modules/pykakasi/default.nix
index 79ce3eeca8f4..1cfb8739888d 100644
--- a/pkgs/development/python-modules/pykakasi/default.nix
+++ b/pkgs/development/python-modules/pykakasi/default.nix
@@ -8,30 +8,37 @@
 , pytest-benchmark
 , pytestCheckHook
 , pythonOlder
+, setuptools
 , setuptools-scm
 }:
 
 buildPythonPackage rec {
   pname = "pykakasi";
   version = "2.2.1";
-  format = "setuptools";
+  pyproject = true;
 
   disabled = pythonOlder "3.6";
 
   src = fetchFromGitHub {
     owner = "miurahr";
-    repo = pname;
+    repo = "pykakasi";
     rev = "refs/tags/v${version}";
     hash = "sha256-ivlenHPD00bxc0c9G368tfTEckOC3vqDB5kMQzHXbVM==";
   };
 
-  nativeBuildInputs = [
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail ', "klepto"' ""
+  '';
+
+  build-system = [
     setuptools-scm
   ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     jaconv
     deprecated
+    setuptools
   ] ++ lib.optionals (pythonOlder "3.8") [
     importlib-metadata
   ];
diff --git a/pkgs/tools/audio/spotdl/default.nix b/pkgs/tools/audio/spotdl/default.nix
index f4a7e207bef3..e80ee6773106 100644
--- a/pkgs/tools/audio/spotdl/default.nix
+++ b/pkgs/tools/audio/spotdl/default.nix
@@ -9,24 +9,24 @@ let
   python = python3;
 in python.pkgs.buildPythonApplication rec {
   pname = "spotdl";
-  version = "4.2.4";
+  version = "4.2.5";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "spotDL";
     repo = "spotify-downloader";
     rev = "refs/tags/v${version}";
-    hash = "sha256-U0UA94t7WdCeU9Y86rcnT8BzXVx8ryhD3MTJxmNBYcc=";
+    hash = "sha256-vxMhFs2mLbVQndlC2UpeDP+M4pwU9Y4cZHbZ8y3vWbI=";
   };
 
-  nativeBuildInputs = with python.pkgs; [
+  build-system = with python.pkgs; [
     poetry-core
     pythonRelaxDepsHook
   ];
 
   pythonRelaxDeps = true;
 
-  propagatedBuildInputs = with python.pkgs; [
+  dependencies = with python.pkgs; [
     spotipy
     ytmusicapi
     pytube
@@ -43,10 +43,8 @@ in python.pkgs.buildPythonApplication rec {
     platformdirs
     pykakasi
     syncedlyrics
-    typing-extensions
     soundcloud-v2
     bandcamp-api
-    setuptools # for pkg_resources
   ] ++ python-slugify.optional-dependencies.unidecode;
 
   nativeCheckInputs = with python.pkgs; [