anchor.diff:  
   RUN \
       yum clean all \
  -    && yum install -y epel-release \
       && yum upgrade -y \
       && yum groupinstall -y "Development Tools" \
       && yum install -y \
  +           wget \
              cmake \
              pkgconfig \
              openssl-devel \
  -           sqlite-devel \
  -           wget
  +           sqlite-devel
   
   RUN cd /tmp && \
       curl https://download.libsodium.org/libsodium/releases/libsodium-1.0.12.tar.gz | tar -xz && \
  
positive.code: RUN useradd -ms /bin/bash -u $uid sovrin
  USER sovrin
  
  WORKDIR /home/sovrin
negative.code: ENV LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/usr/local/lib
  
  RUN cd /tmp && \
      wget https://github.com/zeromq/libzmq/releases/download/v4.2.2/zeromq-4.2.2.tar.gz && \
      tar xfz zeromq-4.2.2.tar.gz && rm zeromq-4.2.2.tar.gz && \
      cd /tmp/zeromq-4.2.2 && \
      ./configure && \
      make && \
      make install && \
      rm -rf /tmp/zeromq-4.2.2
  
  ENV RUST_ARCHIVE=rust-1.16.0-x86_64-unknown-linux-gnu.tar.gz
  ENV RUST_DOWNLOAD_URL=https://static.rust-lang.org/dist/$RUST_ARCHIVE
  