Create reproducible FAT image
The FAT image (efiboot.img
) created by mkfs.fat
has a non-reproducible volume ID (UUID
) and file system creation time.
dosfstools (of which mkfs.fat
is part of) does not support SOURCE_DATE_EPOCH
at all; see https://github.com/dosfstools/dosfstools/pull/106 .
Since we cannot use mformat, the only option is to wait until dosfstools gains support for SOURCE_DATE_EPOCH
.