anchor.diff:      };
   
       boot.growPartition = true;
  -    boot.kernelParams = [ "console=ttyS0" ];
  +    boot.kernelParams = [ "console=tty1" ];
       boot.loader.grub.device = if (!cfg.efi) then "/dev/vda" else "nodev";
       boot.loader.grub.efiSupport = cfg.efi;
       boot.loader.grub.efiInstallAsRemovable = cfg.efi;
       boot.loader.timeout = 1;
       boot.loader.grub.extraConfig = ''
  -      serial --unit=0 --speed=115200 --word=8 --parity=no --stop=1
  +      serial --unit=1 --speed=115200 --word=8 --parity=no --stop=1
         terminal_output console serial
         terminal_input console serial
       '';
  
positive.code:     ../profiles/qemu-guest.nix
  
      # Note: While we do use the headless profile, we also explicitly
      # turn on the serial console on ttyS0 below.
      ../profiles/headless.nix
  
      # The Openstack Metadata service exposes data on an EC2 API also.
  
negative.code: 
      users.users.root.initialPassword = "foobar";
  
      # Enable the serial console on tty1
      systemd.services."serial-getty@tty1".enable = true;
  
      # Force getting the hostname from Openstack metadata.
      networking.hostName = mkDefault "";
  