diff --git a/pkgs/development/python-modules/stdlibs/default.nix b/pkgs/development/python-modules/stdlibs/default.nix
index a8f7f1b607fd..85fe295237e0 100644
--- a/pkgs/development/python-modules/stdlibs/default.nix
+++ b/pkgs/development/python-modules/stdlibs/default.nix
@@ -3,32 +3,41 @@
   buildPythonPackage,
   fetchFromGitHub,
   flit-core,
+  moreorless,
+  unittestCheckHook,
 }:
 
-buildPythonPackage rec {
+buildPythonPackage (finalAttrs: {
   pname = "stdlibs";
-  version = "2026.2.26";
+  version = "2026.9.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "omnilib";
     repo = "stdlibs";
-    tag = "v${version}";
-    hash = "sha256-5Brb214tglEEjsJXOvEhlaJgSYCUpOGPbHkmI9AWPoM=";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-W2fj+hGZ5UA/XNO0CUyTbz/Wwhh3pr/2qB8Su5TdKPM=";
   };
 
+  postPatch = ''
+    substituteInPlace pyproject.toml \
+      --replace-fail "flit_core >=4,<5" "flit_core"
+  '';
+
   build-system = [ flit-core ];
 
-  # Module has no tests
-  doCheck = false;
+  nativeCheckInputs = [
+    moreorless
+    unittestCheckHook
+  ];
 
   pythonImportsCheck = [ "stdlibs" ];
 
   meta = {
     description = "Overview of the Python stdlib";
     homepage = "https://github.com/omnilib/stdlibs";
-    changelog = "https://github.com/omnilib/stdlibs/blob/${src.tag}/CHANGELOG.md";
+    changelog = "https://github.com/omnilib/stdlibs/blob/${finalAttrs.src.tag}/CHANGELOG.md";
     license = lib.licenses.mit;
     maintainers = with lib.maintainers; [ fab ];
   };
-}
+})