anchor.diff:  
   # .[all] only works with -e, so use file://path#egg
   # Can't use -e because ipython2 and ipython3 will clobber each other
  -RUN pip2 install --upgrade file:///srv/ipython#egg=ipython[all]
  -RUN pip3 install --upgrade file:///srv/ipython#egg=ipython[all]
  +RUN pip2 install file:///srv/ipython#egg=ipython[all]
  +RUN pip3 install file:///srv/ipython#egg=ipython[all]
   
   # install kernels
   RUN python2 -m IPython kernelspec install-self --system
   RUN python3 -m IPython kernelspec install-self --system
   
  +WORKDIR /tmp/
  +
  +RUN iptest2
  +RUN iptest3
  
positive.code: # In order to build from source, need less
  RUN npm install -g less
  
  RUN apt-get -y install fabric
  
  RUN mkdir -p /srv/
  WORKDIR /srv/
  
negative.code: FROM ubuntu:14.04
  
  MAINTAINER IPython Project <ipython-dev@scipy.org>
  
  ENV DEBIAN_FRONTEND noninteractive
  
  # Make sure apt is up to date
  RUN apt-get update
  