diff --git a/setup.py b/setup.py
index ec38a57b..0892f27b 100644
--- a/setup.py
+++ b/setup.py
@@ -50,16 +50,9 @@
         except KeyError:
             distutils.log.warn('You probably need Visual Studio 2010 (10.0) '
                                'or higher')
-    # vsvarsall.bat might not exist in %VS...CMNTOOLS% directory
-    if not os.path.isfile(os.path.join(os.environ[vscomntools_env],
-                                       'vcvarsall.bat')):
-        os.environ[vscomntools_env] = os.path.join(
-            os.environ[vscomntools_env],
-            '..', '..', 'VC'
-        )
     distutils.log.warn('%%%s%%=%s',
                        vscomntools_env,
-                       os.environ[vscomntools_env])
+                       os.environ.get(vscomntools_env, ''))
     # Workaround http://bugs.python.org/issue4431 under Python <= 2.6
     if sys.version_info < (2, 7):
         def spawn(self, cmd):