anchor.diff:  RUN /bin/bash -l -c "rvm install 2.6.0"
   RUN /bin/bash -l -c "rvm install 2.7.0"
   RUN /bin/bash -l -c "rvm install 3.0.0"
  +RUN /bin/bash -l -c "rvm install jruby-9.2.19.0"
  +RUN /bin/bash -l -c "rvm install jruby-9.3.0.0"
   
   RUN /bin/bash -l -c "echo 'gem: --no-ri --no-rdoc' > ~/.gemrc"
   RUN /bin/bash -l -c "echo 'export PATH=/usr/local/rvm/bin:$PATH' >> ~/.bashrc"
  
positive.code: FROM debian:jessie
  
  # Install dependencies.  We start with the basic ones require to build protoc
  # and the C++ build
  
negative.code:   parallel \
    time \
    wget \
    # Java dependencies
    maven \
    openjdk-8-jdk \
    && apt-get clean
  
  # Install rvm
  RUN gpg --keyserver hkp://keyserver.ubuntu.com --recv-keys \
      409B6B1796C275462A1703113804BB82D39DC0E3 \
      7D2BAF1CF37B13E2069D6956105BD0E739499BDB
  RUN \curl -sSL https://get.rvm.io | bash -s master
  