anchor.diff:    services.ttyBackgrounds.enable = false;
     jobs.openssh.startOn = pkgs.lib.mkOverrideTemplate 50 {} "";
   
  +  # Needed for nixos to evaluate
  +  system.build.menuBuilder = "true";
  +
     nixpkgs.config = {
       platform = pkgs.platforms.sheevaplug;
     };
  
positive.code:       # "console=ttyS0,115200n8"  # serial console
      ];
  
    boot.kernelPackages = pkgs.linuxPackages_2_6_35;
  
    services.mingetty = {
      ttys = [ "ttyS0" ];
  
negative.code: 
  {
    require =
      [
        ./system-tarball.nix
        ../../hardware/network/rt73.nix
      ];
  