anchor.diff:  
       environment.systemPackages = [ pkgs.dbus.daemon pkgs.dbus ];
   
  +    environment.etc = singleton
  +      { source = configDir;
  +        target = "dbus-1";
  +      };
  +
       users.extraUsers.messagebus = {
         uid = config.ids.uids.messagebus;
         description = "D-Bus system message bus daemon user";
  
positive.code:       mkdir -p $out
  
        cp ${pkgs.dbus.out}/share/dbus-1/{system,session}.conf $out
  
        # include by full path
        sed -ri "s@/etc/dbus-1/(system|session)-@$out/\1-@" $out/{system,session}.conf
  
negative.code:       # Don't restart dbus-daemon. Bad things tend to happen if we do.
        reloadIfChanged = true;
        restartTriggers = [ configDir ];
      };
  
      systemd.user = {
  