diff --git a/pkgs/development/python-modules/aiomodernforms/default.nix b/pkgs/development/python-modules/aiomodernforms/default.nix
index 103c2e9fad03..bd3f05b94273 100644
--- a/pkgs/development/python-modules/aiomodernforms/default.nix
+++ b/pkgs/development/python-modules/aiomodernforms/default.nix
@@ -2,6 +2,8 @@
   lib,
   buildPythonPackage,
   fetchFromGitHub,
+  fetchpatch,
+  setuptools,
   aiohttp,
   backoff,
   yarl,
@@ -13,7 +15,7 @@
 buildPythonPackage rec {
   pname = "aiomodernforms";
   version = "0.1.8";
-  format = "setuptools";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "wonderslug";
@@ -22,13 +24,18 @@ buildPythonPackage rec {
     hash = "sha256-Vx51WBjjNPIfLlwMnAuwHnGNljhnjKkU0tWB9M9rjsw=";
   };
 
-  postPatch = ''
-    substituteInPlace aiomodernforms/modernforms.py --replace-fail \
-      "with async_timeout.timeout(self._request_timeout):" \
-      "async with async_timeout.timeout(self._request_timeout):"
-  '';
+  patches = [
+    # https://github.com/wonderslug/aiomodernforms/pull/274
+    (fetchpatch {
+      name = "replace-async-timeout-with-asyncio.timeout.patch";
+      url = "https://github.com/wonderslug/aiomodernforms/commit/61f1330b2fc244565fd97ae392b9778faa1bab09.patch";
+      hash = "sha256-7sy5/HgPYgVpULgeEu3tFBa2iXIskAqcarf0RndxTpE=";
+    })
+  ];
 
-  propagatedBuildInputs = [
+  build-system = [ setuptools ];
+
+  dependencies = [
     aiohttp
     backoff
     yarl
@@ -46,6 +53,8 @@ buildPythonPackage rec {
     "test_empty_response"
   ];
 
+  __darwinAllowLocalNetworking = true;
+
   pythonImportsCheck = [ "aiomodernforms" ];
 
   meta = with lib; {