diff --git a/pkgs/development/python-modules/help2man/default.nix b/pkgs/development/python-modules/help2man/default.nix
index df9398fcb265..134e0429e842 100644
--- a/pkgs/development/python-modules/help2man/default.nix
+++ b/pkgs/development/python-modules/help2man/default.nix
@@ -2,7 +2,7 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
-  pythonOlder,
+  pythonAtLeast,
   jinja2,
   setuptools-scm,
   shtab,
@@ -15,8 +15,6 @@ buildPythonPackage rec {
   version = "0.0.9";
   pyproject = true;
 
-  disabled = pythonOlder "3.9";
-
   src = fetchFromGitHub {
     owner = "Freed-Wu";
     repo = "help2man";
@@ -24,17 +22,24 @@ buildPythonPackage rec {
     hash = "sha256-BIDn+LQzBtDHUtFvIRL3NMXNouO3cMLibuYBoFtCUxI=";
   };
 
-  nativeBuildInputs = [
+  build-system = [
     jinja2
     setuptools-scm
     shtab
     tomli
   ];
 
-  propagatedBuildInputs = [ jinja2 ];
+  dependencies = [ jinja2 ];
 
   nativeCheckInputs = [ pytestCheckHook ];
 
+  disabledTests = lib.optionals (pythonAtLeast "3.13") [
+    # Checks the output of `help2man --help`.
+    # Broken since 3.13 due to changes in `argparse`.
+    # Upstream issue: https://github.com/Freed-Wu/help2man/issues/6
+    "test_help"
+  ];
+
   pythonImportsCheck = [ "help2man" ];
 
   meta = with lib; {