diff --git a/pkgs/development/python-modules/cexprtk/default.nix b/pkgs/development/python-modules/cexprtk/default.nix
index dbe641016cb2..f2109813affd 100644
--- a/pkgs/development/python-modules/cexprtk/default.nix
+++ b/pkgs/development/python-modules/cexprtk/default.nix
@@ -3,18 +3,21 @@
   fetchPypi,
   buildPythonPackage,
   pytestCheckHook,
+  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "cexprtk";
-  version = "0.4.1";
-  format = "setuptools";
+  version = "0.4.2";
+  pyproject = true;
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-QhftIybufVPO/YbLFycR4qYEAtQMcRPP5jKS6o6dFZg=";
+    hash = "sha256-sBLkHco0u2iEsdUxmPW2ONP/Fe08p0fOVJLmzz3t4os=";
   };
 
+  build-system = [ setuptools ];
+
   nativeCheckInputs = [ pytestCheckHook ];
 
   pythonImportsCheck = [ "cexprtk" ];
@@ -22,6 +25,7 @@ buildPythonPackage rec {
   meta = {
     description = "Mathematical expression parser, cython wrapper";
     homepage = "https://github.com/mjdrushton/cexprtk";
+    changelog = "https://github.com/mjdrushton/cexprtk/blob/${version}/CHANGES.md";
     license = lib.licenses.cpl10;
     maintainers = with lib.maintainers; [ onny ];
   };