anchor.diff:        
         echo Packing layer
         mkdir $out
  -      tar -C layer -cf $out/layer.tar .
  +      tar -C layer --mtime=0 -cf $out/layer.tar .
         ts=$(${tarsum} < $out/layer.tar)
         cat ${baseJson} | jshon -s "$ts" -i checksum > $out/json
         echo -n "1.0" > $out/VERSION
  
positive.code: 
          echo Packing layer
          mkdir $out
          tar -C layer -cf $out/layer.tar .
          ts=$(${tarsum} < $out/layer.tar)
          cat ${baseJson} | jshon -s "$ts" -i checksum > $out/json
          echo -n "1.0" > $out/VERSION
  
negative.code: 
        postMount = ''
          echo Packing raw image
          tar -C mnt --mtime=0 -cf $out .
        '';
      };
      
  