anchor.diff:      source activate $PYTHON_2_ENV && \
       pip install --quiet -U --upgrade-strategy only-if-needed --no-cache-dir \
           apache-airflow==1.9.0 \
  +        apache-beam==2.4.0 \
           bs4==0.0.1 \
           ggplot==0.6.8 \
           google-cloud-dataflow==2.0.0 \
  
positive.code:     conda create --yes --quiet --name $PYTHON_3_ENV python=3.5 \
          crcmod==1.7 \
          dask==0.17.1 \
          google-api-python-client==1.6.2 \
          httplib2==0.10.3 \
          h5py==2.7.1 \
  
negative.code:     conda create --yes --quiet --name $PYTHON_2_ENV python=2.7 \
          crcmod==1.7 \
          dask==0.17.1 \
  	dill==0.2.6 \
          future==0.16.0 \
          futures==3.2.0 \
          google-api-python-client==1.6.2 \
  