From 03497c40ca3902485cb171aaee673c6eac9ed4d5 Mon Sep 17 00:00:00 2001
From: Ivan Kravets <me@ikravets.com>
Date: Thu, 6 Oct 2016 15:50:41 +0300
Subject: [PATCH] Pass only 3-rd party PySites to global env

---
 platformio/util.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/platformio/util.py b/platformio/util.py
index c8399187..ba5a928d 100644
--- a/platformio/util.py
+++ b/platformio/util.py
@@ -343,7 +343,8 @@ def copy_pythonpath_to_osenv():
     if "PYTHONPATH" in os.environ:
         _PYTHONPATH = os.environ.get("PYTHONPATH").split(os.pathsep)
     for p in os.sys.path:
-        if p not in _PYTHONPATH:
+        if p not in _PYTHONPATH and (isdir(join(p, "click")) or
+                                     isdir(join(p, "platformio"))):
             _PYTHONPATH.append(p)
     os.environ['PYTHONPATH'] = os.pathsep.join(_PYTHONPATH)