anchor.diff:  
   # ========== SUMO ==========
   ENV SUMO_VERSION 0.27.1
  -# ENV SUMO_SRC sumo-src-$SUMO_VERSION
  -ENV SUMO_SRC sumo
  +ENV SUMO_SRC sumo-src-$SUMO_VERSION
   ENV SUMO_HOME /opt/sumo
   
   # Install system dependencies.
  
positive.code: RUN /opt/conda/envs/rllab3/bin/pip install --ignore-installed --upgrade https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.11.0rc0-cp35-cp35m-linux_x86_64.whl
  
  RUN apt-get install -y libopenblas-dev
  RUN printf "[blas]\nldflags = -lopenblas\n" > ~/.theanorc
  
negative.code:     wget  --no-check-certificate --quiet https://repo.continuum.io/archive/Anaconda2-2.5.0-Linux-x86_64.sh && \
      /bin/bash /Anaconda2-2.5.0-Linux-x86_64.sh -b -p /opt/conda && \
      rm /Anaconda2-2.5.0-Linux-x86_64.sh
  
  RUN apt-get install -y curl grep sed dpkg && \
      TINI_VERSION=`curl https://github.com/krallin/tini/releases/latest | grep -o "/v.*\"" | sed 's:^..\(.*\).$:\1:'` && \
  