The persistent journal is stored in a subdirectory of `/var/log/journal`
named for the current machine ID. Since `/etc/machine-id` is not
writable, the machine ID changes with every boot. This effectively
makes the journal for previous boots inaccessible, so there's really not
much point in keeping them around.
In effort to support different builds of Aimee OS using the same
scripts, without necessarily having to fork this repository, the build
system now supports a `CONFIGDIR` setting. When this variable is set,
files defining the target environment, such as the lists of packages to
install, the kernel configuration, the Portage configuration, etc. are
found in the path it specifes.
The reference build, for the Home Assistant Yellow board, is configured
in the `yellow` directory. To build it, run:
```sh
CONFIGDIR=yellow ./vm-build.sh
```
Dustin