bookie_error

if [  ]; then \
		sudo apt-get install -y build-essential libxslt1-dev libxml2-dev python-dev libpq-dev git python-virtualenv redis-server unzip; \
	else \
		sudo apt-get install build-essential libxslt1-dev libxml2-dev python-dev libpq-dev git python-virtualenv redis-server unzip; \
	fi
Reading package lists... Done
Building dependency tree
Reading state information... Done
git is already the newest version.
python-virtualenv is already the newest version.
redis-server is already the newest version.
build-essential is already the newest version.
libpq-dev is already the newest version.
libxml2-dev is already the newest version.
libxslt1-dev is already the newest version.
python-dev is already the newest version.
unzip is already the newest version.
0 upgraded, 0 newly installed, 0 to remove and 7 not upgraded.
virtualenv .
Traceback (most recent call last):
  File "/usr/local/bin/virtualenv", line 5, in <module>
    from pkg_resources import load_entry_point
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2707, in <module>
    working_set.require(__requires__)
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 686, in require
    needed = self.resolve(parse_requirements(requirements))
  File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 584, in resolve
    raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: virtualenv==1.7.1.2
make: *** [bin/python] Error 1