anchor.diff:  
   SHELL ["/bin/bash", "-o", "pipefail", "-c"]
   # hadolint ignore=DL3003
  -RUN curl -sL https://ftp.gnu.org/gnu/tar/tar-1.32.tar.gz | tar xz \
  +RUN curl -sL http://ftp.gnu.org/gnu/tar/tar-1.32.tar.gz | tar xz \
       && cd /tar-1.32 \
       && FORCE_UNSAFE_CONFIGURE=1 ./configure --prefix=/usr/local \
       && make install \
  
positive.code:   && mkdir -p bin etc include lib opt sbin share var/homebrew/linked Cellar \
    && ln -s ../Homebrew/bin/brew /home/linuxbrew/.linuxbrew/bin/ \
    && HOMEBREW_NO_ANALYTICS=1 HOMEBREW_NO_AUTO_UPDATE=1 brew tap homebrew/core \
    && brew cleanup \
    && { git -C /home/linuxbrew/.linuxbrew/Homebrew config --unset gc.auto; true; } \
    && { git -C /home/linuxbrew/.linuxbrew/Homebrew config --unset homebrew.devcmdrun; true; } \
  
negative.code: ENV HOMEBREW_ON_DEBIAN7=1
  ENV HOMEBREW_CURL_PATH=/usr/bin/curl
  ENV HOMEBREW_GIT_PATH=/usr/bin/git
  ENV HOMEBREW_FORCE_BREWED_CA_CERTIFICATES=1
  
  # hadolint ignore=DL3008
  RUN apt-get update \
  