{pkgs, ...}: {
  environment.systemPackages = with pkgs; [
    # prescurve
    # libsForQt5.skanpage
    intel-gpu-tools
    powertop
    fw-ectool
  ];

  powerManagement.powertop.enable = true;
  services.fwupd.enable = true;
  services.fprintd.enable = true;
  hardware.sensor.iio.enable = true;

  services.xserver.displayManager.defaultSession = "plasma";
  services.xserver.displayManager.sddm.wayland.enable = true;

  # systemd.user.services.backlight = {
  #   # description = "";
  #   ExecStart = "${pkgs.prescurve}/bin/prescurve_backlight";
  #   Restart = "on-failure";
  #   wantedBy = [ "default.target" ];
  # };
  # hardware.sane = {
  #   enable = true;
  #   extraBackends = [ pkgs.epkowa ];
  # };

  services.snapper.configs = {
    home = {
      SUBVOLUME = "/home";
      ALLOW_USERS = ["vy" "tao"];
      TIMELINE_CREATE = true;
      TIMELINE_CLEANUP = true;
      TIMELINE_LIMIT_HOURLY = "5";
      TIMELINE_LIMIT_DAILY = "7";
    };
  };
  services.snapper.snapshotInterval = "*:0/5";

  services.udev.extraRules = ''
    # Ethernet expansion card
    ACTION=="add", SUBSYSTEM=="usb", ATTR{idVendor}=="0bda", ATTR{idProduct}=="8156", ATTR{power/autosuspend}="20"

    ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chgrp video /sys/class/backlight/%k/brightness"
    ACTION=="add", SUBSYSTEM=="backlight", RUN+="${pkgs.coreutils}/bin/chmod g+w /sys/class/backlight/%k/brightness"
  '';

  fileSystems."/home" = {
    device = "/dev/disk/by-uuid/e4244a97-9b48-49f0-8093-782163045020";
    fsType = "btrfs";
    options = ["subvol=home-snaps/0/snapshot" "noatime" "compress-force=zstd:3" "discard=async"];
  };
  fileSystems."/home/tao/Games" = {
    device = "/dev/disk/by-uuid/e4244a97-9b48-49f0-8093-782163045020";
    fsType = "btrfs";
    options = ["subvol=games" "nosuid" "nodev" "noatime" "compress-force=zstd:3" "users" "rw" "exec" "discard=async"];
  };
  fileSystems."/" = {
    device = "/dev/disk/by-uuid/e4244a97-9b48-49f0-8093-782163045020";
    fsType = "btrfs";
    options = ["subvol=nixos" "noatime" "compress-force=zstd:3" "discard=async"];
  };
  swapDevices = [{device = "/dev/disk/by-uuid/ca55d0ea-c0db-44c5-af3a-e38eec803929";}];

  boot.kernelPackages = pkgs.linuxPackages_latest;
  boot.initrd.availableKernelModules = [
    "nvme"
    "sd_mod"
    "thunderbolt"
    "usb_storage"
    "xhci_pci"
  ];
  boot.kernelParams = [
    "acpi_osi=\"!Windows 2020\""
    "mem_sleep_default=deep"
    "nvme.noacpi=1"
    "i915.enable_psr=1"
  ];
  boot.blacklistedKernelModules = ["cros-usbpd-charger"];
  boot.extraModprobeConfig = ''options snd-hda-intel model=dell-headset-multi'';
  boot.kernelModules = ["kvm-intel"];
  powerManagement.cpuFreqGovernor = "powersave";
  systemd.sleep.extraConfig = "HibernateDelaySec=180m";
  # boot.kernel.sysctl."net.ipv4.ip_forward" = "1";
  # boot.kernel.sysctl."net.ipv6.conf.all.forwarding" = "1";

  networking.hostName = "NOlaptop";
}