On Dec 22, 2014 8:00 AM, "Christian Hesse" <list@xxxxxxxx> wrote: > For Arch packages there is nothing that requires repeatable output. Yes, there is. Package signatures are made using the compressed package. Delta packages work by patching the uncompressed package and then recompressing it. If the compressor works differently the verification of the product will fail. I'm not sure xdelta3 in smart enough to compensate, or if the needed information is even there.