jobs -> systemd.services

missed an override

nixos/modules/installer/cd-dvd/system-tarball-pc.nix

···
   # not be started by default on the installation CD because the
   # default root password is empty.
   services.openssh.enable = true;
-  jobs.openssh.startOn = lib.mkOverride 50 "";
+  systemd.services.openssh.wantedBy = lib.mkOverride 50 [];
 
   # To be able to use the systemTarball to catch troubles.
   boot.crashDump = {