Also, aha? So the store IS still available? In that case we can just use
fuser -ikvm / for debugging, and fuser -km / for production. Something like, (system* #$(file-append (@ (gnu packages linux) psmisc) "/bin/fuser") "-ikvwm" "/") But good to know that the problem's scope can probably reduced to shepherd-internal. We'll see. In any case, after rebuilding the checkout (why...) and running the vm thing again it finally works and I get logs. Nice.