anchor.diff:  # configuration.  The derivation for the ISO image will be placed in
   # config.system.build.isoImage.
   
  -{config, pkgs, ...}:
  +{ config, pkgs, ... }:
  +
  +with pkgs.lib;
   
   let
   
     options = {
   
  -    isoImage.isoName = pkgs.lib.mkOption {
  +    isoImage.isoName = mkOption {
         default = "cd.iso";
         description = ''
           Name of the generated ISO image file.
         '';
       };
   
  -    isoImage.compressImage = pkgs.lib.mkOption {
  +    isoImage.compressImage = mkOption {
         default = false;
         description = ''
           Whether the ISO image should be compressed using
  
positive.code:       '';
      };
  
      isoImage.contents = pkgs.lib.mkOption {
        example =
          [ { source = pkgs.memtest86 + "/memtest.bin";
              target = "boot/memtest.bin";
  
negative.code:       '';
      };
  
      isoImage.storeContents = mkOption {
        example = [pkgs.stdenv];
        description = ''
          This option lists additional derivations to be included in the
  