Lenovo Chromebook Duet — Mobile NixOS

Building

This will build the default output for your Lenovo Chromebook Duet.

$ nix-build --argstr device lenovo-krane -A outputs.default

The default output is a disk-image that can be written on a storage media that your device can boot from.

This one is annoying to get started currently. Without a full Mobile NixOS build, you will need to fill in some gaps manually.

The upstream documentation about the disk format may help shed some light in understanding how these devices boot.

One of the important thing to realise is that you will likely need to dd the image to a storage media, either external or internal.

The kpart output can be used to build only the stage-1, which is helpful for updating the kernel and the stage-1 boot program.

$ nix-build --argstr device lenovo-krane -A outputs.kpart

This can be `dd’d over the first partition on an existing storage media containing a Mobile NixOS installation.

For more details the Firmware Menu Interface section from the upstream documentation can be read.

You will need to:

Boot in Recovery mode by powering on using Power + Volume-Up + Volume-Down
Activate Developer mode by pressing Volume-Up and Volume-Down simultaneously

Note that this is only to allow you to boot unverified images.

You may want to configure other options with GBB flags. This is left as an exercise to the reader.