anchor.diff:  # ML & TensorFlow
   RUN pip3 install -U scikit-learn pandas
   RUN pip3 install -U https://storage.googleapis.com/tensorflow/linux/cpu/tensorflow-0.8.0-cp34-cp34m-linux_x86_64.whl
  +
   
   # Ruby on Rails
   RUN git clone git://github.com/sstephenson/rbenv.git /root/.rbenv
  
positive.code: RUN echo $(ruby -v)
  RUN gem update --system
  RUN gem install bundler rails
  RUN rbenv rehash
negative.code: RUN rm /bin/sh && ln -s /bin/bash /bin/sh
  
  # General dependencies
  RUN apt-get update && apt-get install -y git curl wget python-software-properties software-properties-common
  RUN add-apt-repository -y ppa:openjdk-r/ppa
  RUN wget -O - https://debian.neo4j.org/neotechnology.gpg.key | apt-key add -;
  RUN sh -c 'echo "deb http://debian.neo4j.org/repo stable/" > /etc/apt/sources.list.d/neo4j.list'
  
  RUN apt-get update
  RUN apt-get install -y git-core zlib1g-dev build-essential libssl-dev libreadline-dev libyaml-dev libsqlite3-dev sqlite3 libxml2-dev libxslt1-dev libcurl4-openssl-dev libffi-dev libprotobuf-dev libleveldb-dev libsnappy-dev libopencv-dev libhdf5-serial-dev libatlas-dev libzmq3-dev libboost-all-dev libgflags-dev libgoogle-glog-dev liblmdb-dev protobuf-compiler libopenblas-dev libblas-dev liblapack-dev gfortran openjdk-8-jdk neo4j
  
  ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
  
  
  # Nodejs
  RUN curl -sL https://deb.nodesource.com/setup_6.x | bash -
  RUN apt-get install -y nodejs
  # gulp for streaming build, forever for keep-alive
  RUN npm i -g gulp forever ngrok istanbul
  
  
  # Python
  RUN apt-get install -y python python3-dev python3-pip python3-numpy python3-scipy python3-matplotlib
  