Chroot

chroot (short for “change root”) is a system call and command that changes the apparent root directory. This can come in very handy to make some modifications in the generated image file.

Enter the armhf building chroot:

$ pmbootstrap chroot -b armhf

Run a command inside a chroot:

$ pmbootstrap chroot -- echo test

Safely delete all chroots:

$ pmbootstrap zap

Use chroot to install a specific kernel version from an apk file.

copy your working kernel apk to the chroot dir of pmbootstrap:

$ sudo cp /path/of/linux-kernel.apk ~/.local/var/pmbootstrap/chroot_rootfs_oneplus-enchilada/

enter chroot

$ pmbootstrap chroot -r

and install the package:

$ apk add linux-kernel.apk