nixpkgs/nixos/modules/services/misc/clipcat.nix

{ config, lib, pkgs, ... }:
let
  cfg = config.services.clipcat;
in {

  options.services.clipcat= {
    enable = lib.mkEnableOption "Clipcat clipboard daemon";

    package = lib.mkPackageOption pkgs "clipcat" { };
  };

  config = lib.mkIf cfg.enable {
    systemd.user.services.clipcat = {
      enable      = true;
      description = "clipcat daemon";
      wantedBy = [ "graphical-session.target" ];
      after    = [ "graphical-session.target" ];
      serviceConfig.ExecStart = "${cfg.package}/bin/clipcatd --no-daemon";
    };

    environment.systemPackages = [ cfg.package ];
  };
}