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