title: protocol error setting up virtualenvironment through vagrant on ubuntu
body: <p>I'm trying to set up a virtualenv on Ubuntu 12.04 with Python 2.7 using vagrant but having same issues. it seems like this issues is seen only when "vagrant up" is issued from windows. what is the solution? any pointers?</p>
  
  <pre><code>New python executable in .vagrant-env/bin/python
    Traceback (most recent call last):
    File "/usr/local/bin/virtualenv", line 9, in &lt;module&gt;
      load_entry_point('virtualenv==1.11.6', 'console_scripts', 'virtualenv')()
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 824, in main
      symlink=options.symlink)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 984, in   create_environment
      site_packages=site_packages, clear=clear, symlink=symlink))
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 1404, in install_python
      os.symlink(py_executable_base, full_pth)
     OSError: [Errno 71] Protocol error
  </code></pre>