anchor.diff:  , configurationOverrides ? (config: {})
   # Whether to put all the build-time dependencies on DVD
   , includeBuildDeps ? false
  +, includeTarballs ? true
   }:
   
   rec {
  
positive.code:     else "nixos-${builtins.readFile ../../VERSION}"
  , compressImage ? false
  , nixpkgs ? ../../../nixpkgs
  # 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
                mkdir -p /etc/nixos/services
                tar xjf /install/services.tar.bz2 -C /etc/nixos/services
                chown -R root.root /etc/nixos
              end script
            ";
  