anchor.diff:  
   # build and install minimalistic busybox
   ARG BUSY_BOX_VERSION=1.26.2
  +WORKDIR /tmp
   RUN [ $(getent group registrator) ] || addgroup -S registrator \
       && [ $(getent passwd registrator) ] || adduser -S -D -G registrator registrator \
       && apk add --no-cache --virtual .busybox-build-deps \
  
positive.code:         musl-dev \
          ncurses-dev \
          openssl \
      && wget -O- "https://busybox.net/downloads/busybox-${BUSY_BOX_VERSION}.tar.bz2" > /tmp/busybox.tar.bz2 \
      && cd /tmp \
      && tar xfj busybox.tar.bz2 \
      && cd /tmp/busybox-${BUSY_BOX_VERSION} \
      && mv /busybox-config .config \
      && make \
      && for DEL_SYM_LINK in $(/bin/busybox find / -type l | /bin/busybox grep bin); do /bin/busybox rm ${DEL_SYM_LINK}; done \
  
negative.code: 
  # build and install registrator
  WORKDIR /go/src/github.com/gliderlabs/registrator
  RUN apk add --no-cache --virtual .run-deps \
          ca-certificates \
      && apk add --no-cache --virtual .go-build-deps \
             build-base \
             git \
  