Whether to enable hydra-ad-hoc, an experimental service presenting Hydra as one big Nix daemon. It serves the Nix daemon protocol on services.hydra.adHoc.socketPath, and derivations realised through it are built by the queue runner as Hydra builds of a hidden adhoc/adhoc jobset.
Members of the hydra-ad-hoc group can use the socket. Until the daemon has its own access control, they are effectively trusted Nix users on this machine, so grant membership as carefully as nix.settings.trusted-users.