
"machine.target" doesn't actually exist, it's misspelled version of "machines.target". However, the "systemd-nspawn@.service" unit already has a default dependency on "machines.target"
*** NixOS *** NixOS is a Linux distribution based on the purely functional package management system Nix. More information can be found at http://nixos.org/nixos and in the manual in doc/manual.