gistfile1.txt

pip install virtualenv
Collecting virtualenv
/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:315: SNIMissingWarning: An HTTPS request has been made, but the SNI (Subject Name Indication) extension to TLS is not available on this platform. This may cause the server to present an incorrect TLS certificate, which can cause validation failures. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#snimissingwarning.
  SNIMissingWarning
/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/_vendor/requests/packages/urllib3/util/ssl_.py:120: InsecurePlatformWarning: A true SSLContext object is not available. This prevents urllib3 from configuring SSL appropriately and may cause certain SSL connections to fail. For more information, see https://urllib3.readthedocs.org/en/latest/security.html#insecureplatformwarning.
  InsecurePlatformWarning
  Using cached virtualenv-15.1.0-py2.py3-none-any.whl
Installing collected packages: virtualenv
Exception:
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/basecommand.py", line 209, in main
    status = self.run(options, args)
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/commands/install.py", line 317, in run
    prefix=options.prefix_path,
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/req/req_set.py", line 732, in install
    **kwargs
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/req/req_install.py", line 835, in install
    self.move_wheel_files(self.source_dir, root=root, prefix=prefix)
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/req/req_install.py", line 1030, in move_wheel_files
    isolated=self.isolated,
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/wheel.py", line 344, in move_wheel_files
    clobber(source, lib_dir, True)
  File "/usr/local/lib/python2.7/site-packages/pip-8.1.0-py2.7.egg/pip/wheel.py", line 322, in clobber
    shutil.copyfile(srcfile, destfile)
  File "/usr/local/lib/python2.7/shutil.py", line 83, in copyfile
    with open(dst, 'wb') as fdst:
IOError: [Errno 13] Permission denied: '/usr/local/lib/python2.7/site-packages/virtualenv.py'
You are using pip version 8.1.0, however version 9.0.1 is available.