From 1f59be5188c0989db3bc8900f2c11b6706c07d70 Mon Sep 17 00:00:00 2001
From: AUTOMATIC1111 <16777216c@gmail.com>
Date: Sat, 22 Jul 2023 16:37:03 +0300
Subject: Merge pull request #11926 from wfjsw/fix-env-get-1

fix 11291#issuecomment-1646547908
---
 modules/launch_utils.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/modules/launch_utils.py b/modules/launch_utils.py
index 93c8c8ca..e1c9cfbe 100644
--- a/modules/launch_utils.py
+++ b/modules/launch_utils.py
@@ -196,7 +196,7 @@ def run_extension_installer(extension_dir):
 
     try:
         env = os.environ.copy()
-        env['PYTHONPATH'] = f"{os.path.abspath('.')}{os.pathsep}{env['PYTHONPATH']}"
+        env['PYTHONPATH'] = f"{os.path.abspath('.')}{os.pathsep}{env.get('PYTHONPATH', '')}"
 
         print(run(f'"{python}" "{path_installer}"', errdesc=f"Error running install.py for extension {extension_dir}", custom_env=env))
     except Exception as e:
-- 
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