anchor.diff:      && cd /tmp \
       && pip3 install --no-cache-dir wheel \
       && : \
  +    && : add python symlink to avoid python detection error \
  +    && $(cd /usr/bin && ln -s python3 python) \
       && : install Bazel to build TensorFlow \
       && curl -SLO https://github.com/bazelbuild/bazel/releases/download/${BAZEL_VERSION}/bazel-${BAZEL_VERSION}-dist.zip \
       && mkdir bazel-${BAZEL_VERSION} \
  
positive.code: ENV JAVA_HOME /usr/lib/jvm/java-1.8-openjdk
  ENV LOCAL_RESOURCES 2048,.5,1.0
  
  ENV BAZEL_VERSION 0.5.2
  ENV TENSORFLOW_VERSION 1.3.0
  
  RUN apk add --no-cache python3 python3-tkinter py3-numpy py3-numpy-f2py freetype libpng libjpeg-turbo imagemagick graphviz git
  
negative.code:     && curl -SL https://github.com/tensorflow/tensorflow/archive/v${TENSORFLOW_VERSION}.tar.gz \
          | tar xzf - \
      && cd tensorflow-${TENSORFLOW_VERSION} \
      && : musl-libc does not have "secure_getenv" function \
      && sed -i -e '/JEMALLOC_HAVE_SECURE_GETENV/d' third_party/jemalloc.BUILD \
      && PYTHON_BIN_PATH=/usr/bin/python \
  