--- ./platformio/util.py-old	2017-09-29 01:20:08.174548250 +0200
+++ ./platformio/util.py	2017-09-29 01:19:48.410485308 +0200
@@ -395,7 +395,7 @@
                 isdir(join(p, "click")) or isdir(join(p, "platformio")))
         if all(conditions):
             _PYTHONPATH.append(p)
-    os.environ['PYTHONPATH'] = os.pathsep.join(_PYTHONPATH)
+    os.environ['PYTHONPATH'] = os.pathsep.join(sys.path)
 
 
 def get_serialports(filter_hwid=False):