diff --git a/pkgs/development/python-modules/aiolimiter/default.nix b/pkgs/development/python-modules/aiolimiter/default.nix
index a76d3a3ec8d8..9569cfb0d133 100644
--- a/pkgs/development/python-modules/aiolimiter/default.nix
+++ b/pkgs/development/python-modules/aiolimiter/default.nix
@@ -3,20 +3,16 @@
   buildPythonPackage,
   fetchFromGitHub,
   poetry-core,
-  importlib-metadata,
   pytest-asyncio,
   pytest-cov-stub,
   pytestCheckHook,
-  pythonOlder,
   toml,
 }:
 
 buildPythonPackage rec {
   pname = "aiolimiter";
   version = "1.2.1";
-  format = "pyproject";
-
-  disabled = pythonOlder "3.7";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "mjpieters";
@@ -25,9 +21,15 @@ buildPythonPackage rec {
     hash = "sha256-wgHR0GzaPXlhL4ErklFqmWNFO49dvd5X5MgyYHVH4Eo=";
   };
 
-  nativeBuildInputs = [ poetry-core ];
+  # ERROR: '"session"' is not a valid asyncio_default_fixture_loop_scope. Valid scopes are: function, class, module, package, session.
+  # Post 1.2.1, the project switched from tox and is no longer affected, hence fixed in nixpkgs only.
+  postPatch = ''
+    substituteInPlace tox.ini --replace-fail \
+      'asyncio_default_fixture_loop_scope = "session"' \
+      'asyncio_default_fixture_loop_scope = session'
+  '';
 
-  propagatedBuildInputs = lib.optionals (pythonOlder "3.8") [ importlib-metadata ];
+  build-system = [ poetry-core ];
 
   nativeCheckInputs = [
     pytest-asyncio
@@ -38,11 +40,11 @@ buildPythonPackage rec {
 
   pythonImportsCheck = [ "aiolimiter" ];
 
-  meta = with lib; {
+  meta = {
     description = "Implementation of a rate limiter for asyncio";
     homepage = "https://github.com/mjpieters/aiolimiter";
     changelog = "https://github.com/mjpieters/aiolimiter/blob/v${version}/CHANGELOG.md";
-    license = with licenses; [ mit ];
-    maintainers = with maintainers; [ fab ];
+    license = with lib.licenses; [ mit ];
+    maintainers = with lib.maintainers; [ fab ];
   };
 }