inputs:
{
  options.nixos.system.user = let inherit (inputs.lib) mkOption types; in
  {
    user = mkOption
    {
      type = types.attrsOf types.ints.unsigned;
      readOnly = true;
      default =
      {
        chn = 1000;
        xll = 1001;
        yjq = 1002;
        yxy = 1003;
        zem = 1004;
        misskey-misskey = 2000;
        misskey-misskey-old = 2001;
        frp = 2002;
        mirism = 2003;
        httpapi = 2004;
        httpua = 2005;
        rsshub = 2006;
        v2ray = 2007;
        fz-new-order = 2008;
        synapse-synapse = 2009;
      };
    };
    group = mkOption
    {
      type = types.attrsOf types.ints.unsigned;
      readOnly = true;
      default = inputs.config.nixos.system.user.user //
      {
        groupshare = 3000;
      };
    };
  };
}