Use distribute==0.6.35
git-remote-helpers==0.1.0
lxml==3.1.2
pycrypto==2.6
requests==1.2.0
stevedore==0.8
vboxapi==1.0
virtualenv==1.9.1
virtualenv-clone==0.2.4
virtualenvwrapper==3.6.1
wsgiref==0.1.2 to generate requirements.txt instead