this is useful for when we need to store files to disk purely due to their size, but don't actually want them to be persisted.
prosody is still broken
machines
hosts
- shorter. - congruent with `nixos-rebuild .` choosing what to build based on `hostname`. - more widely used within other nix repos i've seen. - more accurate in the case that i migrate a host to a different machine (which i plan to do with servo).