From 8894ee9bd3d7dcf34a29e366940e1cb0c2871df9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Bern=C3=A1t=20G=C3=A1bor?= <gaborjbernat@gmail.com>
Date: Thu, 8 Dec 2022 09:06:40 -0800
Subject: Pass through NUMBER_OF_PROCESSORS on Windows (#2647)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
---
 src/tox/tox_env/python/api.py | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/tox/tox_env/python/api.py')

diff --git a/src/tox/tox_env/python/api.py b/src/tox/tox_env/python/api.py
index 8be79088..b55068b4 100644
--- a/src/tox/tox_env/python/api.py
+++ b/src/tox/tox_env/python/api.py
@@ -94,6 +94,7 @@ class Python(ToxEnv, ABC):
                     "SYSTEMROOT",  # needed for python's crypto module
                     "COMSPEC",  # needed for distutils cygwin compiler
                     "PROCESSOR_ARCHITECTURE",  # platform.machine()
+                    "NUMBER_OF_PROCESSORS",  # multiprocessing.cpu_count()
                 ],
             )
         env.extend(["REQUESTS_CA_BUNDLE"])
-- 
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