Inconsistent file ordering when generating checksums

[superbonaci]

Performed md5deep -r folder/ several consecutive times, my surprise is that each time the file order may differ, even if the contents are exactly the same. For example:

First checksum generation:

md5deep -r folder/ > 1.md5
xxxx  clonezilla.iso
xxxx  debian.iso
xxxx  gparted.iso
xxxx  Mac.iso
xxxx  archlinux.iso
xxxx  memtest86-usb.zip

Second checksum generation:

md5deep -r folder/ > 2.md5
xxxx  clonezilla.iso
xxxx  gparted.iso
xxxx  debian.iso
xxxx  Mac.iso
xxxx  memtest86-usb.zip
xxxx  Microsoft.exe

I can't perform any diff 1.md5 2.md5 because the order differs, have to sort them first. Can this be fixed or the file list is randomly generated then checksum is performed?

[superbonaci]

Maybe it's because of this: https://github.com/jessek/hashdeep/issues/394

[paulhargreaves]

Do this: diff <(sort 1.md5) <(sort 2.md5)