anchor.diff:  
   
     # The configuration file for Grub.
  -  grubCfg = pkgs.writeText "menu.lst" ''
  +  grubCfg = pkgs.writeText "menu.lst" (''
       default 0
       timeout 10
       splashimage /boot/background.xpm.gz
  
positive.code:       { object = pkgs.stdenv;
          symlink = "none";
        }
      ];
      
      bootable = true;
      bootImage = "boot/grub/stage2_eltorito";
  
negative.code:         enable = false;
        };
  
        showManual = {
          enable = true;
  	manualFile = manual;
        };
  
        rogue = {
          enable = true;
        };
  
        extraJobs = [
          # Unpack the NixOS/Nixpkgs sources to /etc/nixos.
          # !!! run this synchronously
  