--- a/build/moz.configure/init.configure
+++ b/build/moz.configure/init.configure
@@ -195,17 +195,16 @@ option(env='PYTHON', nargs=1, help='Pyth
 
 # Setup python virtualenv
 # ==============================================================
 
 
 @depends('PYTHON', check_build_environment, mozconfig, '--help')
 @imports('os')
 @imports('sys')
-@imports('subprocess')
 @imports(_from='mozbuild.configure.util', _import='LineIO')
 @imports(_from='mozbuild.virtualenv', _import='VirtualenvManager')
 @imports(_from='mozbuild.virtualenv', _import='verify_python_version')
 @imports('distutils.sysconfig')
 def virtualenv_python(env_python, build_env, mozconfig, help):
     if help:
         return
 
@@ -251,24 +250,16 @@ def virtualenv_python(env_python, build_
         python = sys.executable
 
     if not manager.up_to_date(python):
         log.info('Creating Python environment')
         manager.build(python)
 
     python = normsep(manager.python_path)
 
-    if python != normsep(sys.executable):
-        log.info('Reexecuting in the virtualenv')
-        if env_python:
-            del os.environ['PYTHON']
-        # One would prefer to use os.execl, but that's completely borked on
-        # Windows.
-        sys.exit(subprocess.call([python] + sys.argv))
-
     # We are now in the virtualenv
     if not distutils.sysconfig.get_python_lib():
         die('Could not determine python site packages directory')
 
     return python
 
 
 set_config('PYTHON', virtualenv_python)