anchor.diff:     
     };
   
  +  configuration = baseConfiguration // (configurationOverrides baseConfiguration);
   
     system = import ../../system/system.nix {
       inherit configuration platform nixpkgs;
     };
  -
   
     pkgs = system.pkgs;
   
  
positive.code:   cdLabel = "NIXOS_INSTALLATION_CD";
  
    
    configuration = {
    
      boot = {
        isLiveCD = true;
  
negative.code: 
  
    # The configuration file for Grub.
    grubCfg = pkgs.writeText "menu.lst" (''
      default 0
      timeout 10
      splashimage /boot/background.xpm.gz
  