anchor.diff:      mdocml-apropos \
       # OpenSSH client and server
       openssh \
  +    openssh-doc \
       # Python 2 and 3
       python2 \
       python2-dev \
  
positive.code:     ca-certificates \
      # cURL and Wget
      curl \
      wget \
      # Docker client
      docker \
      # Build essentials
      g++ \
      make \
      # Git, Neovim, Ag, tmux, ZSH
      git \
      neovim \
      neovim-doc \
      the_silver_searcher \
      tmux \
      zsh \
      zsh-vcs \
      # GNU tools
      gnupg \
      less \
      # inotify interface for filesystem events
      inotify-tools \
      # ping, tracetoute, etc.
  
negative.code:     py2-pip \
      # sudo for runtime everyday use only, do not use in build time
      sudo \
      sudo-doc \
      # Timezone database
      tzdata && \
    # Update ca certificates
  