Comment by malwrar

That’s mostly why I build system images in CI; my slowest builds (qemu user mode emulation of aarch64 for e.g. raspberry pi boards) can take multiple days so I just declared myself a 1 week window between updates and then just pull in the changes via rsync. I even boot the images with qemu as part of the testing cycle. At some point I might try building and hosting prebuilt bins like gentoo does now, I don’t use those though because I explicitly want to build everything from source.