Closes #15173: Tidied up copyright statements and removed pythonv references.
diff --git a/Lib/site.py b/Lib/site.py
index a298f26..a0f98b3 100644
--- a/Lib/site.py
+++ b/Lib/site.py
@@ -499,8 +499,8 @@
     global PREFIXES, ENABLE_USER_SITE
 
     env = os.environ
-    if sys.platform == 'darwin' and '__PYTHONV_LAUNCHER__' in env:
-        executable = os.environ['__PYTHONV_LAUNCHER__']
+    if sys.platform == 'darwin' and '__PYVENV_LAUNCHER__' in env:
+        executable = os.environ['__PYVENV_LAUNCHER__']
     else:
         executable = sys.executable
     executable_dir, executable_name = os.path.split(executable)