diff --git a/pkgs/development/python-modules/zconfig/default.nix b/pkgs/development/python-modules/zconfig/default.nix
index 1ff7cd4d6608..bb739b974cca 100644
--- a/pkgs/development/python-modules/zconfig/default.nix
+++ b/pkgs/development/python-modules/zconfig/default.nix
@@ -13,20 +13,16 @@
 
 buildPythonPackage rec {
   pname = "zconfig";
-  version = "4.2";
+  version = "4.3";
   pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-oOS1J3xM7oBgzjNaV4rEWPgsJArpaxZlkgDbxNmL/M4=";
+    hash = "sha256-RyIz5RX6Kb5shz54uKK0UMLNJdATPLRZYIN/M/GrT+M=";
   };
 
   patches = lib.optional stdenv.hostPlatform.isMusl ./remove-setlocale-test.patch;
 
-  postPatch = ''
-    substituteInPlace pyproject.toml --replace-fail 'setuptools <= 75.6.0' 'setuptools'
-  '';
-
   build-system = [ setuptools ];
 
   buildInputs = [