Hello Ben,
> I realise there's lower-level tools like "guix system init" you could use if > you were happy to partition and format the new drive manually, but it would be > such a great user experience to leverage the existing graphical installer from > withing Guix System. The graphical installer relies on some services such as kmscon to change the keyboard layout and connman to connect to the internet for instance. If we were to add a "guix install" command, then we would need to make sure that we run in the same environment as the one described in "gnu/system/install.scm". I agree that it would be an interesting feature for your use-case or to perform some quick tests on the installer. In the meantime, you can start a VM running the installer and using your target drive but that wouldn't be a much better solution than rebooting on a flash drive I guess. Thanks, Mathieu