anchor.diff:  
   {
     require =
  -    [ options
  +    [
         ./system-tarball.nix
         ../../hardware/network/rt73.nix
       ];
  
positive.code:       # "console=ttyS0,115200n8"  # serial console
      ];
  
    boot.kernelPackages = pkgs.linuxPackages_2_6_35;
  
    services.mingetty = {
      ttys = [ "ttyS0" ];
  
negative.code:   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;
    };
  