diff --git a/pkgs/development/python-modules/python-stdnum/default.nix b/pkgs/development/python-modules/python-stdnum/default.nix
index 14efde9224b5..19142bc13fb8 100644
--- a/pkgs/development/python-modules/python-stdnum/default.nix
+++ b/pkgs/development/python-modules/python-stdnum/default.nix
@@ -3,6 +3,7 @@
 , fetchPypi
 , pytestCheckHook
 , pythonOlder
+, zeep
 }:
 
 buildPythonPackage rec {
@@ -17,10 +18,21 @@ buildPythonPackage rec {
     hash = "sha256-vMdj2cSa4j2l0remhtX9He7J2QUTQRYKENGscjomvsA=";
   };
 
+  postPatch = ''
+    substituteInPlace setup.cfg \
+      --replace " --cov=stdnum --cov-report=term-missing:skip-covered --cov-report=html" ""
+  '';
+
   nativeCheckInputs = [
     pytestCheckHook
   ];
 
+  passthru.optional-dependencies = {
+    SOAP = [
+      zeep
+    ];
+  };
+
   pythonImportsCheck = [
     "stdnum"
   ];
@@ -28,6 +40,7 @@ buildPythonPackage rec {
   meta = with lib; {
     description = "Python module to handle standardized numbers and codes";
     homepage = "https://arthurdejong.org/python-stdnum/";
+    changelog = "https://github.com/arthurdejong/python-stdnum/blob/${version}/ChangeLog";
     license = licenses.lgpl21Plus;
     maintainers = with maintainers; [ johbo ];
   };