anchor.diff:  
   # install obspy and dependencies via conda
   RUN conda config --add channels obspy && \
  -    conda install --yes jupyter mysql-python obspy && \
  +    conda install --yes jupyter obspy matplotlib && \
       conda clean -i -l -t -y && \
       useradd \
           -c 'Docker image user' \
  
positive.code: FROM debian:jessie
  
  MAINTAINER Roman Leonhardt <roman.leonhardt@zamg.ac.at>
  LABEL geomagpy.magpy.version=0.3.95
  
  # update os
  RUN apt-get update --fix-missing && \
  
negative.code: 
  # install cdf, spacepy, and magpy
  RUN cd /tmp && \ 
      pip install geomagpy && \
      cd /tmp && \
  
  
  USER magpy_user
  