anchor.diff:        { source = nixpkgsTarball + "/nixpkgs.tar.bz2";
           target = "/install/nixpkgs.tar.bz2";
         }
  -      { source = servicesTarball + "/services.tar.bz2";
  -        target = "/install/services.tar.bz2";
  -      }
       ];
   
       # Closures to be copied to the Nix store on the CD.
  
positive.code:     else "nixos-${builtins.readFile ../../VERSION}"
  , compressImage ? false
  , nixpkgs ? ../../../nixpkgs
  , services ? ../../../services
  # This option allows easy building of Rescue CD with 
  # modified package set / driver set / anything.
  # For easier maitenance, let overrider know the current
  
negative.code:               tar xjf /install/nixos.tar.bz2 -C /etc/nixos/nixos
                mkdir -p /etc/nixos/nixpkgs
                tar xjf /install/nixpkgs.tar.bz2 -C /etc/nixos/nixpkgs
                chown -R root.root /etc/nixos
              end script
            ";
  