Do you use `nix/misc/systemv/nix-daemon`?

It seems that we have this untested [misc/systemv/nix-daemon](https://github.com/NixOS/nix/blob/master/misc/systemv/nix-daemon) file in the Nix package manager, and I was wondering whether you are using it. It would be great if we could reuse your testing infrastructure to make sure that any changes to it are correct. Context: - https://github.com/NixOS/nix/pull/11103