bug#64775: /run should be cleaned on boot

[brian]

Vagrant Cascadian <vagrant@debian.org> writes:

> On 2023-08-08, Ludovic Courtès wrote:
>> We could try to make that change: /run as tmpfs, or wiped by
>> ‘cleanup-service-type’.
>
> Or both, really!
>
> Filed:
>
>   https://issues.guix.gnu.org/64775

I tried this a while ago, and the trivial case of mounting /run as tmpfs
in the operating-system definition causes errors during activation. It
turns out that the /run/current-system symlink is activated before all
non-root mounts, so mounting /run afterwards causes everything to break.

I don't have a solution, and haven't even looked at it past this, but
maybe this report will help.

-bjc