anchor.diff:          }
         '';
     };
  -
   }
  
positive.code:       '';
      };
  
      format = mkOption {
        type = types.enum [ "raw" "qcow2" "vpc" ];
        default = "qcow2";
  
negative.code:     inherit (cfg) contents format;
      pkgs = import ../../../.. { inherit (pkgs) system; }; # ensure we use the regular qemu-kvm package
      partitioned = config.ec2.hvm;
      diskSize = sizeMB;
      configFile = pkgs.writeText "configuration.nix"
        ''
          {
  