Is your feature request related to a problem? Please describe.
The netbootable build of alpine is unreliable because it's process relies on non-pinned upstream packages.
Alpine's mkimage.sh, which is used to make a netbootable zfs image 'installs' a non-deterministic version of mkinitfs.
Describe the solution you'd like
Verify build-alpine-netboot-zfs.sh is reproducible, within reason.
Describe alternatives you've considered
Additional context