anchor.diff:  
   RUN apk add --no-cache \
           apache2-utils \
  +        autoconf \
  +        automake \
           bash \
           bind-tools \
  +        build-base \
  +        file \
           file \
           git \
           git-email \
  
positive.code:         grep \
          iproute2 \
          less \
          libffi \
          make \
          moreutils \
          ncurses \
          nodejs \
          openssh \
          openssl \
          perl \
          python3-dev \
          sudo \
          tree \
          tzdata \
          unzip \
          vim \
          zip \
          zsh \
  
negative.code: RUN cd /tmp \
   && wget https://github.com/nghttp2/nghttp2/releases/download/v${NGHTTP2_VERSION}/nghttp2-${NGHTTP2_VERSION}.tar.bz2 \
   && wget https://dl.uxnr.de/mirror/curl/curl-${CURL_VERSION}.tar.bz2 \
   && tar -xvjf nghttp2-${NGHTTP2_VERSION}.tar.bz2 \
   && cd /tmp/nghttp2-${NGHTTP2_VERSION} \
   && autoreconf -i \
  