anchor.diff:      yubikey-personalization
       yubikey-personalization-gui
       gnome3.geary
  -    #qt5ct
       breeze-icons
       audacity
   
  
positive.code:   sound.enable = true;
    hardware.pulseaudio.enable = true;
  
    environment.variables.QT_QPA_PLATFORMTHEME = "qt5ct";
  
    services = {
  
      udev.packages = [ pkgs.yubikey-personalization ];
  
negative.code:     };
  
    };
  
    # Define a user account. Don't forget to set a password with ‘passwd’.
    users.users.tim = {
  