pythonPackages.trio: disable the tests on Darwin

pkgs/development/python-modules/trio/default.nix

@@ -9,6 +9,7 @@
 , pyopenssl
 , trustme
 , sniffio
+, stdenv
 , jedi
 , pylint
 }:
@@ -37,6 +38,9 @@ buildPythonPackage rec {
     sniffio
   ] ++ lib.optionals (pythonOlder "3.7") [ contextvars ];
 
+  # tests are failing on Darwin
+  doCheck = !stdenv.isDarwin;
+
   meta = {
     description = "An async/await-native I/O library for humans and snake people";
     homepage = https://github.com/python-trio/trio;