anchor.diff:  COPY --from=builder --chown=pliers /opt/pliers /opt/pliers
   ENV PATH="/opt/venv/bin:$PATH"
   USER pliers
  -RUN python -m pliers.support.download
  +RUN python -m pliers.support.download \
  +    && python -m pliers.support.setup_yamnet
   WORKDIR /work
  
positive.code: FROM python:3.6-slim as builder
  ARG DEBIAN_FRONTEND="noninteractive"
  WORKDIR /opt/pliers
  COPY . .
  
negative.code: # Run this in different layers for faster rebuilds when debugging. The extra layers
  # do impose a size penalty, because we build the final image in a separate stage.
  RUN python -m venv /opt/venv
  RUN python -m pip install --no-cache-dir --upgrade pip setuptools wheel
  RUN python -m pip install --no-cache-dir --requirement requirements.txt
  # Install the non-GPU tensorflow package because it is smaller.
  RUN sed -i 's/tensorflow/tensorflow-cpu/g' optional-dependencies.txt \
      && python -m pip install --no-cache-dir --requirement optional-dependencies.txt
  RUN python -m pip install --no-cache-dir --editable .
  RUN python -m pip install --no-cache-dir ipython notebook
  RUN python -m spacy download en_core_web_sm
  
  FROM python:3.7-slim
  RUN useradd --no-user-group --create-home --shell /bin/bash pliers \
      # Empty top level directories to facilitate use of the image in singularity
      # on a box with kernel lacking overlay FS support
  