modified user to be modular, separated machine specific configs

modules/machine/sephiroth/configuration.nix

@@ -168,6 +168,12 @@
     pkgs.bash
   ];
 
+  # Auto upgrade nix package and the daemon service.
+  # services.nix-daemon.enable = true;
+  # Use this instead of services.nix-daemon.enable if you
+  # don't wan't the daemon service to be managed for you.
+  services.nix-daemon.enable = true;
+
   system.stateVersion = 5;
 
   # Set your time zone.