anchor.diff:    && git clone -b v1.7.2 https://github.com/grpc/grpc.git /temp/grpc \
     && cd /temp/grpc \
     && git submodule update --init --recursive \
  -  && make grpc_php_plugin \
  +  && make -j $(nproc) grpc_php_plugin \
     && mv ./bins/opt/grpc_php_plugin /usr/local/bin/ \
     && cd / \
     && rm -r /temp/grpc
  
positive.code:     grpcio-tools==1.10.0 \
      protobuf==3.6.0
  
  # Install grpc_csharp_plubin
  RUN curl -L https://www.nuget.org/api/v2/package/Grpc.Tools/1.3.6 -o temp.zip \
    && unzip -p temp.zip tools/linux_x64/grpc_csharp_plugin > /usr/local/bin/grpc_csharp_plugin \
    && chmod +x /usr/local/bin/grpc_csharp_plugin \
  
negative.code:   && rm -rf /var/lib/apt/lists/*
  
  # Install Go.
  RUN mkdir -p /golang \
    && cd /golang \
    && curl https://dl.google.com/go/go1.10.3.linux-amd64.tar.gz > go.tar.gz \
    && (echo 'fa1b0e45d3b647c252f51f5e1204aba049cde4af177ef9f2181f43004f901035 go.tar.gz' | sha256sum -c) \
    && tar xzf go.tar.gz \
    && cd /
  ENV PATH $PATH:/golang/go/bin
  
  # Download the go protobuf support.
  ENV GOPATH /go
  