anchor.diff:  #-------------------------------------------------------------------------------
   # VTK (http://www.vtk.org)
   #-------------------------------------------------------------------------------
  -RUN apt-get build-dep vtk6
  +RUN apt-get -y build-dep vtk6
   
   RUN \
       mkdir vtk && \
  
positive.code: RUN \
      echo "source /usr/local/bin/virtualenvwrapper.sh" >> $BASHRC && \
      echo "export WORKON_HOME=$HOME/pyenvs" >> $BASHRC
  
  #-------------------------------------------------------------------------------
  # source .bashrc
  
negative.code: # FSL (http://fsl.fmrib.ox.ac.uk)
  #-------------------------------------------------------------------------------
  RUN \
      apt-get install -y fsl-complete && \
      echo "source /etc/fsl/5.0/fsl.sh" >> $BASHRC && \
      echo "export FSLPARALLEL=condor" >> $BASHRC
  
  