anchor.diff:  
       services.udev = {
         packages =
  -        if cfg.ffado.enable then
  -          [ pkgs.ffado ]
  -        else [ ];
  +        if cfg.ffado.enable
  +          then [ pkgs.ffado ]
  +          else [];
   
         extraRules = ''
           KERNEL=="rtc0", GROUP="audio"
  
positive.code:       '';
      };
  
      users.extraGroups= { audio = { }; };
    };
  }
  
negative.code:       kernel.sysctl = { "vm.swappiness" = 10; };
  
        kernelModules =
          if cfg.alsaSeq.enable
            then [ "snd-seq"
                   "snd-rawmidi"
                 ]
            else [];
  
        kernelPackages = let
          rtKernel =
  