anchor.diff:          description = "Whether to enable the Name Service Cache Daemon.";
         };
   
  +      config = mkOption {
  +        type = types.lines;
  +        default = builtins.readFile ./nscd.conf;
  +        description = "Configuration to use for Name Service Cache Daemon.";
  +      };
  +
       };
   
     };
  
positive.code: 
    ###### implementation
  
    config = mkIf config.services.nscd.enable {
  
      users.extraUsers = singleton
        { name = "nscd";
  
negative.code: let
  
    nssModulesPath = config.system.nssModules.path;
    cfg = config.services.nscd;
  
    inherit (pkgs.lib) singleton;
  
  