anchor.diff:  #-------------------------------------------------------------------------------
   # MATLAB and toolboxes
   #-------------------------------------------------------------------------------
  -
  -RUN \
  -    echo "addpath /root/matlab/bin" >> $BASHRC
  +ENV MATLAB_DIR
  +
  +RUN \
  +    echo "export MATLAB_DIR=${MATLAB_DIR}" >> $BASHRC  && \
  +    echo "addpath ${MATLAB_DIR}/bin" >> $BASHRC  && \
   
   
   #-------------------------------------------------------------------------------
  
positive.code:     apt-key adv --recv-keys --keyserver hkp://pgp.mit.edu:80 0xA5D32F012649A5A9 && \
      apt-get update
  
  
  #-------------------------------------------------------------------------------
  # VTK (http://www.vtk.org)
  
negative.code: RUN apt-get -y build-dep vtk6
  
  RUN \
      cd $SOFT && \
      mkdir vtk && \
      cd vtk && \
      git clone $VTK_GIT -b $VTK_VERSION VTK && \
  