From 9604e986417d6fa029909323570b459d4de982f3 Mon Sep 17 00:00:00 2001
From: Dimitri Merejkowsky <dimitri@dmerej.info>
Date: Wed, 3 Nov 2021 10:43:24 +0100
Subject: [PATCH 1/3] Don't look in user site packages when using a virtual env

Fix #11274
---
 mypy/pyinfo.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/mypy/pyinfo.py b/mypy/pyinfo.py
index 7da94e0a1fb92..d4c10bfec287f 100644
--- a/mypy/pyinfo.py
+++ b/mypy/pyinfo.py
@@ -24,7 +24,11 @@ def getprefixes():
 
 def getsitepackages():
     # type: () -> List[str]
-    if hasattr(site, 'getusersitepackages') and hasattr(site, 'getsitepackages'):
+    if (
+        hasattr(site, 'getusersitepackages')
+        and hasattr(site, 'getsitepackages')
+        and site.ENABLE_USER_SITE
+    ):
         user_dir = site.getusersitepackages()
         return site.getsitepackages() + [user_dir]
     else:

From 2a0128ba8591c80946c13e282b14629d1b1ef291 Mon Sep 17 00:00:00 2001
From: Dimitri Merejkowsky <dimitri@dmerej.info>
Date: Thu, 4 Nov 2021 14:05:04 +0100
Subject: [PATCH 2/3] Fixes from review

---
 mypy/pyinfo.py | 16 ++++++++--------
 1 file changed, 8 insertions(+), 8 deletions(-)

diff --git a/mypy/pyinfo.py b/mypy/pyinfo.py
index d4c10bfec287f..21046a52e167f 100644
--- a/mypy/pyinfo.py
+++ b/mypy/pyinfo.py
@@ -24,16 +24,16 @@ def getprefixes():
 
 def getsitepackages():
     # type: () -> List[str]
-    if (
-        hasattr(site, 'getusersitepackages')
-        and hasattr(site, 'getsitepackages')
-        and site.ENABLE_USER_SITE
-    ):
-        user_dir = site.getusersitepackages()
-        return site.getsitepackages() + [user_dir]
+    res = []
+    if  hasattr(site, 'getsitepackages'):
+        res.extend(site.getsitepackages())
+
+        if hasattr(site, 'getsitepackages') and site.ENABLE_USER_SITE:
+            res.insert(0, site.getusersitepackages())
     else:
         from distutils.sysconfig import get_python_lib
-        return [get_python_lib()]
+        res = [get_python_lib()]
+    return res
 
 
 if __name__ == '__main__':

From 48013a4c2746ad6ba75b5ebefaca9ed5c05991c9 Mon Sep 17 00:00:00 2001
From: Ethan Smith <ethan@ethanhs.me>
Date: Thu, 4 Nov 2021 16:34:49 -0700
Subject: [PATCH 3/3] Update mypy/pyinfo.py

---
 mypy/pyinfo.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mypy/pyinfo.py b/mypy/pyinfo.py
index 21046a52e167f..42f45cbbb551b 100644
--- a/mypy/pyinfo.py
+++ b/mypy/pyinfo.py
@@ -25,7 +25,7 @@ def getprefixes():
 def getsitepackages():
     # type: () -> List[str]
     res = []
-    if  hasattr(site, 'getsitepackages'):
+    if hasattr(site, 'getsitepackages'):
         res.extend(site.getsitepackages())
 
         if hasattr(site, 'getsitepackages') and site.ENABLE_USER_SITE: