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-rw-r--r--Lib/distutils/sysconfig.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/Lib/distutils/sysconfig.py b/Lib/distutils/sysconfig.py
index 33cc5a38a5..d206e0cdf9 100644
--- a/Lib/distutils/sysconfig.py
+++ b/Lib/distutils/sysconfig.py
@@ -389,7 +389,7 @@ def _init_posix():
cur_target = os.getenv('MACOSX_DEPLOYMENT_TARGET', '')
if cur_target == '':
cur_target = cfg_target
- os.putenv('MACOSX_DEPLOYMENT_TARGET', cfg_target)
+ os.environ['MACOSX_DEPLOYMENT_TARGET'] = cfg_target
elif map(int, cfg_target.split('.')) > map(int, cur_target.split('.')):
my_msg = ('$MACOSX_DEPLOYMENT_TARGET mismatch: now "%s" but "%s" during configure'
% (cur_target, cfg_target))