title: How do I change all necessary permissions for virtualenv to run without sudo?
body: <pre><code>$ virtualenv --no-site-packages myenv
  The --no-site-packages flag is deprecated; it is now the default behavior.
  Traceback (most recent call last):
    File "/usr/local/bin/virtualenv", line 8, in &lt;module&gt;
      load_entry_point('virtualenv==1.7.1.2', 'console_scripts', 'virtualenv')()
    File "/usr/local/lib/python2.7/dist-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 928, in main
      never_download=options.never_download)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 1029, in create_environment
      site_packages=site_packages, clear=clear))
    File "/usr/local/lib/python2.7/dist-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 1154, in install_python
      mkdir(lib_dir)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv-1.7.1.2-py2.7.egg/virtualenv.py", line 399, in mkdir
      os.makedirs(path)
    File "/usr/lib/python2.7/os.py", line 150, in makedirs
      makedirs(head, mode)
    File "/usr/lib/python2.7/os.py", line 150, in makedirs
      makedirs(head, mode)
    File "/usr/lib/python2.7/os.py", line 157, in makedirs
      mkdir(name, mode)
  OSError: [Errno 13] Permission denied: 'myenv'
  </code></pre>
  
  <p>I have been struggling to figure out how to be able to get virtualenv to make a new environment without sudo.</p>