anchor.diff:                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
  -              mkdir -p /etc/nixos/services
  -              tar xjf /install/services.tar.bz2 -C /etc/nixos/services
                 chown -R root.root /etc/nixos
               end script
             ";
  
positive.code:       { 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.
  
negative.code:   
      boot = {
        isLiveCD = true;
  
        extraModulePackages = [system.kernelPackages.aufs];
        
        kernelPackages = pkgs.kernelPackages_2_6_28;
  