From 43f1475131a929536b08e4095c67630cace6ca2d Mon Sep 17 00:00:00 2001
From: Isuru Fernando <isuruf@gmail.com>
Date: Fri, 24 Dec 2021 04:08:37 +0530
Subject: [PATCH] Use mock.patch.dict to patch os.environ

---
 distutils/_msvccompiler.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/distutils/_msvccompiler.py b/distutils/_msvccompiler.py
index b7a06082..c41ea9ae 100644
--- a/distutils/_msvccompiler.py
+++ b/distutils/_msvccompiler.py
@@ -527,7 +527,7 @@ def _fallback_spawn(self, cmd, env):
             return
         warnings.warn(
             "Fallback spawn triggered. Please update distutils monkeypatch.")
-        with unittest.mock.patch('os.environ', env):
+        with unittest.mock.patch.dict('os.environ', env):
             bag.value = super().spawn(cmd)
 
     # -- Miscellaneous methods -----------------------------------------