anchor.diff:          openjdk-8-jdk \
           openssh-client \
           pkg-config \
  -        python-software-properties \
  +        software-properties-common \
           ruby-full \
           software-properties-common \
           unzip \
  
positive.code:         autoconf \
          curl \
          git \
          lib32stdc++6 \
          lib32z1 \
          lib32z1-dev \
  
negative.code: FROM ubuntu:18.04
  
  MAINTAINER Ming Chen
  
  