Added some important info in the main post. Older Kobo users (like Mini users), could you report what the
command outputs for you? I've added a warning that you should take the armhf version if this command outputs "armhf", otherwise the binaries may not work.
But maybe I'm dumb classifying these processor architectures, because after reading on the Web that armv7=armhf
But still... why would Alpine Linux provide armv7 AND armhf minirootfs?