anchor.diff:  
   	# install dependencies
   	&& apt-get install -y --no-install-recommends ca-certificates wget \
  -		build-essential libssl-dev libboost-all-dev git \
  +		build-essential libssl1.0-dev gnupg dirmngr libboost-all-dev zlib1g-dev git \
   
   	# grab gosu for easy step-down from root
  -	&& gpg --keyserver pool.sks-keyservers.net --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
  -	&& wget -qO /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.7/gosu-$(dpkg --print-architecture)" \
  -	&& wget -qO /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/1.7/gosu-$(dpkg --print-architecture).asc" \
  +	&& gpg --keyserver pgp.mit.edu --recv-keys B42F6819007F00F88E364FD4036A9C25BF357DD4 \
  +	&& wget -qO /usr/local/bin/gosu "https://github.com/tianon/gosu/releases/download/1.10/gosu-$(dpkg --print-architecture)" \
  +	&& wget -qO /usr/local/bin/gosu.asc "https://github.com/tianon/gosu/releases/download/1.10/gosu-$(dpkg --print-architecture).asc" \
   	&& gpg --verify /usr/local/bin/gosu.asc \
   	&& rm /usr/local/bin/gosu.asc \
   	&& chmod +x /usr/local/bin/gosu \
  
positive.code: 
  	# cleanup
  	&& cd ../.. && rm -rf /usr/src/sixeleven \
  	&& apt-get -y purge build-essential libssl-dev libboost-all-dev git \
  	&& apt-get -y autoremove \
  	&& apt-get clean \
  	&& rm -rf /var/lib/apt/lists/*
  
negative.code: # 611 (SixEleven) docker iamge
  
  FROM debian:stretch
  
  MAINTAINER Florian Fuessl <flo@degnet.de>
  ENV REFRESHED_AT 20171029
  
  RUN groupadd -r sixeleven && useradd -r -m -g sixeleven sixeleven
  
  