anchor.diff:  
     baseUrl = "https://dl.google.com/dl/cloudsdk/channels/rapid/downloads";
     sources = name: system: {
  -    i686-linux = {
  -      url = "${baseUrl}/${name}-linux-x86.tar.gz";
  -      sha256 = "0fq8zw1a5c0mnmw6f7j9j80y6kq0f0v2wn1d7b8mfq8ih5x53a85";
  -    };
  -
       x86_64-darwin = {
         url = "${baseUrl}/${name}-darwin-x86_64.tar.gz";
  -      sha256 = "1h4m70fk3hri4lgm9lh2pm0v196nc2r3hpf42h3xx5k7sqklsns2";
  +      sha256 = "0c4jj580f7z6phiw4zhd32dlf4inkrxy3cig6ng66fi4zi6vnpc9";
       };
   
       x86_64-linux = {
  
positive.code:     license = licenses.free;
      homepage = "https://cloud.google.com/sdk/";
      maintainers = with maintainers; [ stephenmw zimbatm ];
      platforms = [ "i686-linux" "x86_64-linux" "x86_64-darwin" ];
    };
  }
  
negative.code:         mkdir -p $out/bin
          ln -s $programPath $binaryPath
      done
  
      # disable component updater and update check
      substituteInPlace $out/google-cloud-sdk/lib/googlecloudsdk/core/config.json \
        --replace "\"disable_updater\": false" "\"disable_updater\": true"
  