diff --git a/pkgs/development/python-modules/clevercsv/default.nix b/pkgs/development/python-modules/clevercsv/default.nix
index 963f81827fca..22416afa6ebe 100644
--- a/pkgs/development/python-modules/clevercsv/default.nix
+++ b/pkgs/development/python-modules/clevercsv/default.nix
@@ -22,11 +22,6 @@ buildPythonPackage rec {
     hash = "sha256-zpnUw0ThYbbYS7CYgsi0ZL1qxbY4B1cy2NhrUU9uzig=";
   };
 
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace "packaging>=23.0" "packaging"
-  '';
-
   propagatedBuildInputs = [
     chardet
     faust-cchardet