title: Virtualenv returning a 'No such file or directory...' error
body: <p>The command <code>virtualenv --no-site-packages env/</code> produces the following error stack trace:</p>
  
  <pre><code>    The --no-site-packages flag is deprecated; it is now the default behavior.
  New python executable in env/bin/python
  Installing setuptools.............done.
  Installing pip...
    Error [Errno 2] No such file or directory while executing command /home/zach/School/CS...env/bin/easy_install /usr/local/lib/pytho...pport/pip-1.1.tar.gz
  ...Installing pip...done.
  Traceback (most recent call last):
    File "/usr/local/bin/virtualenv", line 9, in &lt;module&gt;
      load_entry_point('virtualenv==1.7.1.2', 'console_scripts', 'virtualenv')()
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 928, in main
      never_download=options.never_download)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 1042, in create_environment
      install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 640, in install_pip
      filter_stdout=_filter_setup)
    File "/usr/local/lib/python2.7/dist-packages/virtualenv.py", line 966, in call_subprocess
      cwd=cwd, env=env)
    File "/usr/lib/python2.7/subprocess.py", line 679, in __init__
      errread, errwrite)
    File "/usr/lib/python2.7/subprocess.py", line 1239, in _execute_child
      raise child_exception
  OSError: [Errno 2] No such file or directory
  </code></pre>
  
  <p>I am using Ubuntu 11.10 and Python 2.7.</p>
  
  <p>EDIT:
  Figured it out.</p>
  
  <p>I originally installed it with pip, so I uninstalled via pip and that reinstalled via <code>apt-get</code>.</p>