anchor.diff:      && apt-get install -y git \
       && apt-get install -y wget \
       && apt-get install -y libssl-dev \
  -    && curl -fOSL "https://unbound.net/downloads/unbound-1.5.8.tar.gz" \
  +    && curl -fOSL "https://unbound.net/downloads/unbound-1.6.3.tar.gz" \
       && mkdir -p /usr/src/unbound \
  -    && tar -xzC /usr/src/unbound --strip-components=1 -f unbound-1.5.8.tar.gz \
  -    && rm unbound-1.5.8.tar.gz \
  +    && tar -xzC /usr/src/unbound --strip-components=1 -f unbound-1.6.3.tar.gz \
  +    && rm unbound-1.6.3.tar.gz \
       && apt-get -y install libidn11-dev \
       && apt-get -y install python-dev \
       && apt-get -y install make \
  
positive.code:     && cd /usr/src \
      && git clone https://github.com/getdnsapi/getdns.git \
      && cd /usr/src/getdns \
      && git checkout develop \
      && git submodule update --init \
      && libtoolize -ci \
      && autoreconf -fi \
  
negative.code: FROM  ubuntu:16.04
  MAINTAINER Melinda Shore <melinda.shore@nomountain.net>
  
  RUN set -ex \
  