Hi Ludo, On Sat, 06 Feb 2021 at 22:46, Ludovic Courtès wrote: > Having looked at the tar manual (info "(tar) hard links"), it seems > clear that this is the default behavior and that we have to pass > ‘--hard-dereference’ to avoid it. Attached a patch that fixes the issue, I guess. Well, I am not sure to understand all correctly, yet. :-) Now the 2 images have the same checksum on my 2 machines. WDYT? Cheers, simon