anchor.diff:  
     ###### implementation
   
  -  config = mkIf config.services.nscd.enable {
  +  config = mkIf cfg.enable {
   
       users.extraUsers = singleton
         { name = "nscd";
  
positive.code: let
  
    nssModulesPath = config.system.nssModules.path;
  
    inherit (pkgs.lib) singleton;
  
  
negative.code:         restartTriggers = [ config.environment.etc.hosts.source ];
  
          serviceConfig =
            { ExecStart = "@${pkgs.glibc}/sbin/nscd nscd -f ${pkgs.writeText "nscd.conf" cfg.config}";
              Type = "forking";
              PIDFile = "/run/nscd/nscd.pid";
              Restart = "always";
  