anchor.diff:  FROM ubuntu:16.10
   
   ##########################
  -# Replace shell with bash so we can source files
  +# bash for 'source' commands
   RUN rm /bin/sh && ln -s /bin/bash /bin/sh
   
  -# Set debconf to run non-interactively
  +# run non-interactively
   RUN echo 'debconf debconf/frontend select Noninteractive' | debconf-set-selections
   
   RUN apt-get -y update
  -
  -# TODO: remove nginx?
   RUN apt-get -y install \
       apt-utils \
       gcc \
  
positive.code:     && yarn install \
      && npm rebuild node-sass \
      && npm install \
      && cp /usr/local/nvm/versions/node/v6.10.0/bin/node /usr/bin/node \
      && cp /usr/local/nvm/versions/node/v6.10.0/bin/npm /usr/bin/npm
  
  RUN yarn --version
  RUN node --version
  RUN /usr/local/nvm/versions/node/v6.10.0/bin/npm --version
  
  RUN pwd && ls
  ##########################
  
  ##########################
  
negative.code: WORKDIR $GOPATH/src/github.com/coreos/etcdlabs
  
  RUN go install -v
  RUN etcdlabs --help
  ##########################
  
  ##########################
  # install frontend dependencies
  # 'node' needs to be in $PATH for 'yarn start' command
  ENV NVM_DIR /usr/local/nvm
  RUN curl https://raw.githubusercontent.com/creationix/nvm/v0.33.0/install.sh | bash \
      && source $NVM_DIR/nvm.sh \
  