Closes #29308: Merged fix from 3.6.

Lib/venv/scripts/nt/Activate.ps1

@@ -29,13 +29,15 @@ deactivate -nondestructive
 
 $env:VIRTUAL_ENV="__VENV_DIR__"
 
-# Set the prompt to include the env name
-# Make sure _OLD_VIRTUAL_PROMPT is global
-function global:_OLD_VIRTUAL_PROMPT {""}
-copy-item function:prompt function:_OLD_VIRTUAL_PROMPT
-function global:prompt {
-    Write-Host -NoNewline -ForegroundColor Green '__VENV_PROMPT__'
-    _OLD_VIRTUAL_PROMPT
+if (! $env:VIRTUAL_ENV_DISABLE_PROMPT) {
+    # Set the prompt to include the env name
+    # Make sure _OLD_VIRTUAL_PROMPT is global
+    function global:_OLD_VIRTUAL_PROMPT {""}
+    copy-item function:prompt function:_OLD_VIRTUAL_PROMPT
+    function global:prompt {
+        Write-Host -NoNewline -ForegroundColor Green '__VENV_PROMPT__'
+        _OLD_VIRTUAL_PROMPT
+    }
 }
 
 # Clear PYTHONHOME