anchor.diff:    && gem install grpc-tools --version '=1.10.0' --no-ri --no-rdoc
   
   # Install grpc_php_plugin
  -RUN git clone -b v1.7.2 --recurse-submodules https://github.com/grpc/grpc.git /temp/grpc \
  +RUN git clone -b v1.7.2 --recurse-submodules --depth=1 https://github.com/grpc/grpc.git /temp/grpc \
     && cd /temp/grpc \
     && make -j $(nproc) grpc_php_plugin \
     && mv ./bins/opt/grpc_php_plugin /usr/local/bin/ \
  
positive.code: 
  RUN apt-get update \
    && apt-get install -y --no-install-recommends \
      build-essential \
      pkg-config \
      libffi-dev \
      libssl-dev \
      curl \
      git \
      openssh-client \
      # runtime packages
      unzip \
      php-pear \
      python3-pip \
      # Java
      openjdk-8-jdk \
      # NodeJS
      # This installs Node 4 on Ubuntu 16.04.
      nodejs \
  
negative.code:     libtool \
      autotools-dev \
      automake \
      make \
      g++ \
      # Used to create Python doc
      pandoc \
      # .NET dependencies
  