From: Victor Stinner <vstinner@python.org>
Date: Thu, 30 Jan 2025 00:02:31 +0000 (+0100)
Subject: gh-128779: Fix site venv() for system site-packages (#129184)
X-Git-Tag: v3.14.0a5~179
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=a549f439384b4509b25639337ffea21c2e55d452;p=thirdparty%2FPython%2Fcpython.git

gh-128779: Fix site venv() for system site-packages (#129184)
---

diff --git a/Lib/site.py b/Lib/site.py
index 92bd1ccdadd9..9da8b6724e1c 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -633,12 +633,9 @@ def venv(known_paths):
         # Doing this here ensures venv takes precedence over user-site
         addsitepackages(known_paths, [sys.prefix])
 
-        # addsitepackages will process site_prefix again if its in PREFIXES,
-        # but that's ok; known_paths will prevent anything being added twice
         if system_site == "true":
-            PREFIXES.insert(0, sys.prefix)
+            PREFIXES += [sys.base_prefix, sys.base_exec_prefix]
         else:
-            PREFIXES = [sys.prefix]
             ENABLE_USER_SITE = False
 
     return known_paths