anchor.diff:          tar -tf temp/layer.tar >> baseFiles
           sed 's/^\.//' -i baseFiles
           comm <(sort -n baseFiles|uniq) <(sort -n layerFiles|uniq|grep -v ${layer}) -1 -3 > newFiles
  -        tar -rpf temp/layer.tar --no-recursion --files-from newFiles 2>/dev/null || true
  +        tar -rpf temp/layer.tar --mtime=0 --no-recursion --files-from newFiles 2>/dev/null || true
   
           echo Adding meta
           
  
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:         chmod -R a-w image
  
          echo Cooking the image
          tar -C image --mtime=0 -c . | pigz -nT > $out
        '';
  
      in
  