anchor.diff:  FROM continuumio/miniconda3
   
   #====================================================================================
  -RUN conda create -n env python=3.7
  +RUN conda create -n env python=3.8
   RUN echo "source activate env" > ~/.bashrc
   ENV PATH /opt/conda/envs/env/bin:$PATH
   
  
positive.code: USER root
  
  RUN conda create -n FERRET -c conda-forge pyferret ferret_datasets --yes
  RUN conda install -c r rpy2
  
  RUN pip install --no-cache-dir notebook==6.*
  
negative.code: WORKDIR /opt
  RUN git clone https://github.com/PBrockmann/fast
  
  ENV FER_DATA=". ${FER_DATA} /opt/fast"
  ENV FER_GO=". ${FER_GO} /opt/fast"
  ENV FER_PALETTE=". /${FER_PALETTE} /opt/fast"
  ENV PATH="${FER_DIR}/bin:/opt/fast:${PATH}"
  
  #====================================================================================
  