协议错误通过ubuntu上的vagrant设置虚拟环境

我正试图在Ubuntu 12.04上用Python 2.7建立一个virtualenv使用vagrant但有相同的问题.似乎只有当从窗口发出"vagrant up"时才能看到这个问题.解决办法是什么？任何指针？

New python executable in .vagrant-env/bin/python
  Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 9, in 
    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

anatoly tech.. 31

解决方案是使用--always-copy.请看这里的血腥细节.