booster build booster.img
booster build booster2.img
diff booster.img booster2.img # they are different even though nothing has changed in the system
booster unpack booster.img bunpack
booster unpack booster2.img bunpack2
git diff bunpack bunpack2
The diff shows that the only difference is the file usr/lib/modules/booster.alias.
Sorting them makes the two images equal.
Is there a reason for that? I would like to be able to just diff them to check if they match or not.