anchor.diff:      && apt-get clean \
       && rm -rf /var/lib/apt/lists/*
   ENV FINDBUGS_HOME /usr
  -
  -####
  -# Install shellcheck (0.4.6, the latest as of 2017-09-26)
  -####
  -# hadolint ignore=DL3008
  -RUN add-apt-repository -y ppa:hvr/ghc \
  -    && apt-get -q update \
  -    && apt-get -q install -y --no-install-recommends shellcheck ghc-8.0.2 \
  -    && apt-get clean \
  -    && rm -rf /var/lib/apt/lists/*
  -
  -####
  -# Install bats (0.4.0, the latest as of 2017-09-26, ships with Xenial)
  -####
  -# hadolint ignore=DL3008
  -RUN apt-get -q update \
  -    && apt-get -q install -y --no-install-recommends bats \
  -    && apt-get clean \
  -    && rm -rf /var/lib/apt/lists/*
   
   ####
   # Install pylint at fixed version (2.0.0 removed python2 support)
  
positive.code: RUN apt-get -q update \
      && apt-get -q install -y --no-install-recommends \
          apt-utils \
          build-essential \
          bzip2 \
          clang \
          curl \
          doxygen \
          fuse \
  
negative.code: ENV PATH "${PATH}:/opt/protobuf/bin"
  
  ######
  # Install Apache Maven 3.6.0 (3.6.0 ships with Bionic)
  ######
  # hadolint ignore=DL3008
  RUN apt-get -q update \
  