[Fab-user] The `plugin_env` should be an ``Environment`` instance that contains pkg_resources.VersionConflict: (pycrypto 2.0.1 (/usr/lib/python2.6/dist-packages), Requirement.parse('pycrypto>=2.1'))

[Nilesh]

On a freshly installed ubuntu LTS 10.04.3 server I am getting errors
and I would appreciate help in understanding how to resolve. Thanks
and much appreciated.

Steps I took are described below.

sudo apt-get install python-setuptools
sudo easy_install pip
sudo pip install virtualenv virtualenvwrapper
mkdir ~/domains
append below three lines to ~/.bashrc
    export WORKON_HOME=$HOME/domains
    source /usr/local/bin/virtualenvwrapper.sh
    export PIP_VIRTUALENV_BASE=$WORKON_HOME
exit and restart shell
mkvirtualenv w
cd ~/domains/w

(w)address@hidden:~/domains/w$ pip install fabric
Downloading/unpacking fabric
  Downloading Fabric-1.2.2.tar.gz (155Kb): 155Kb downloaded
  Running setup.py egg_info for package fabric
    warning: no previously-included files matching '*' found under
directory 'docs/_build'
    warning: no files found matching 'fabfile.py'
Requirement already satisfied (use --upgrade to upgrade):
pycrypto>=1.9 in /usr/lib/python2.6/dist-packages (from fabric)
Downloading/unpacking paramiko>=1.7.6 (from fabric)
  Downloading paramiko-1.7.7.1.zip (1.1Mb): 1.1Mb downloaded
  Running setup.py egg_info for package paramiko
Installing collected packages: fabric, paramiko
  Running setup.py install for fabric
    warning: no previously-included files matching '*' found under
directory 'docs/_build'
    warning: no files found matching 'fabfile.py'
    Installing fab script to /home/nilesh/domains/w/bin
  Running setup.py install for paramiko
Successfully installed fabric paramiko
Cleaning up...

(w)address@hidden:~/domains/w$ fab
Traceback (most recent call last):
  File "/home/nilesh/domains/w/bin/fab", line 5, in <module>
    from pkg_resources import load_entry_point
  File 
"/home/nilesh/domains/w/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg/pkg_resources.py",
line 2607, in <module>
    comment-only lines.  If there are any such lines before the first section
  File 
"/home/nilesh/domains/w/lib/python2.6/site-packages/setuptools-0.6c11-py2.6.egg/pkg_resources.py",
line 569, in resolve
    The `plugin_env` should be an ``Environment`` instance that contains
pkg_resources.VersionConflict: (pycrypto 2.0.1
(/usr/lib/python2.6/dist-packages),
Requirement.parse('pycrypto>=2.1'))