doc: Mention where to get device identifier from
@@ -137,6 +137,8 @@ import the Mobile NixOS configuration for your device by doing the following.
```nix
# configuration.nix
{
+ # "xxx-yyy" is your device "Identifier" from https://mobile.nixos.org/devices,
+ # e.g. "google-marlin".
imports = [
(import <mobile-nixos/lib/configuration.nix> { device = "xxx-yyy"; })
# ...
