diff --git a/setup.py b/setup.py
index 4c7cbac..49047f9 100644
--- a/setup.py
+++ b/setup.py
@@ -3,14 +3,9 @@
 from setuptools.command.test import test as TestCommand
 import sys
 
-setup_dir = osp.dirname(__file__)
-
-# is set down below
-__version__ = None
-
 
 def readme():
-    with open(osp.join(setup_dir, 'README.rst')) as f:
+    with open('README.rst') as f:
         return f.read()
 
 
@@ -30,7 +25,7 @@ def run_tests(self):
 
 
 # read the version from version.py
-with open(osp.join(setup_dir, 'psy_simple', 'version.py')) as f:
+with open(osp.join('psy_simple', 'version.py')) as f:
     exec(f.read())