{
  config,
  lib,
  pkgs,
  # modulesPath,
  ...
}: let
  cb-ucm-conf = pkgs.alsa-ucm-conf.overrideAttrs {
    wttsrc = pkgs.fetchFromGitHub {
      owner = "WeirdTreeThing";
      repo = "chromebook-ucm-conf";
      rev = "b6ce2a7";
      hash = "sha256-QRUKHd3RQmg1tnZU8KCW0AmDtfw/daOJ/H3XU5qWTCc=";
    };
    postInstall = ''
      cp -R $wttsrc/common/* $out/share/alsa/ucm2/common
      cp -R $wttsrc/codecs/* $out/share/alsa/ucm2/codecs
      cp -R $wttsrc/platforms/* $out/share/alsa/ucm2/platforms
      cp -R $wttsrc/sof-rt5682 $out/share/alsa/ucm2/conf.d
      cp -R $wttsrc/sof-cs42l42 $out/share/alsa/ucm2/conf.d
    '';
  };
in {
  boot.initrd.availableKernelModules = ["ahci" "xhci_pci" "virtio_pci" "sr_mod" "virtio_blk" "xe" "i915"];
  boot.initrd.kernelModules = [];
  boot.kernelModules = ["kvm-intel"];
  boot.extraModulePackages = [];

  fileSystems."/" = {
    device = "/dev/disk/by-uuid/fc3d843d-54c6-4b2f-ac56-77f81600745e";
    fsType = "btrfs";
    options = ["subvol=@nixos,compress=zstd"];
  };

  boot.initrd.luks.devices."luks".device = "/dev/disk/by-uuid/cbd7d98e-745b-4828-b868-42881bad353d";

  fileSystems."/home" = {
    device = "/dev/disk/by-uuid/fc3d843d-54c6-4b2f-ac56-77f81600745e";
    fsType = "btrfs";
    options = ["subvol=@home,compress=zstd"];
  };

  fileSystems."/var/lib/flatpak" = {
    device = "/dev/disk/by-uuid/fc3d843d-54c6-4b2f-ac56-77f81600745e";
    fsType = "btrfs";
    options = ["subvol=@flatpak,compress=zstd"];
  };

  fileSystems."/boot" = {
    device = "/dev/disk/by-uuid/D38C-AA51";
    fsType = "vfat";
    options = ["fmask=0077" "dmask=0077"];
  };
  fileSystems."/swap" = {
    device = "/dev/disk/by-uuid/fc3d843d-54c6-4b2f-ac56-77f81600745e";
    fsType = "btrfs";
    options = ["subvol=@swap,compress=zstd"];
  };
  swapDevices = [
    {
      device = "/swap/swapfile";
      size = 8 * 1024; # eight gigs
    }
  ];

  wireless = {
    wifi.enable = true;
    bluetooth.enable = true;
  };

  hardware.graphics = {
    enable = true;
    extraPackages = with pkgs; [
      intel-media-driver
      vaapiIntel
      vpl-gpu-rt
    ];
  };

  # intel ax201 wifi card firmware
  hardware.enableRedistributableFirmware = true;

  hardware.cpu.intel.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
  nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";

  # physically broken touchscreen
  services.udev.extraRules = "ACTION==\"add|change\", KERNELS==\"input[0-9]*\", SUBSYSTEMS==\"input\", ATTRS{id/vendor}==\"27c6\", ATTRS{id/product}==\"0e84\", ENV{LIBINPUT_IGNORE_DEVICE}=\"1\"";
  services.keyd = {
    enable = true;
    keyboards.internal = {
      ids = [
        "k:0001:0001"
        "k:18d1:5044"
        "k:18d1:5052"
        "k:0000:0000"
        "k:18d1:5050"
        "k:18d1:504c"
        "k:18d1:503c"
        "k:18d1:5030"
        "k:18d1:503d"
        "k:18d1:505b"
        "k:18d1:5057"
        "k:18d1:502b"
        "k:18d1:5061"
      ];
      settings = {
        main = {
          f1 = "back";
          f2 = "forward";
          f3 = "refresh";
          f4 = "f11";
          f5 = "scale";
          f6 = "brightnessdown";
          f7 = "brightnessup";
          f8 = "mute";
          f9 = "volumedown";
          f10 = "volumeup";
          f13 = "printscreen";
          back = "back";
          forward = "forward";
          refresh = "refresh";
          zoom = "f11";
          scale = "scale";
          brightnessdown = "brightnessdown";
          brightnessup = "brightnessup";
          mute = "mute";
          volumedown = "volumedown";
          volumeup = "volumeup";
          sleep = "coffee";
          a = "lettermod(alt, a, 200, 150)";
          s = "lettermod(meta, s, 200, 150)";
          d = "lettermod(control, d, 200, 150)";
          f = "lettermod(shift, f, 200, 150)";
          j = "lettermod(shift, j, 200, 150)";
          k = "lettermod(control, k, 200, 150)";
          l = "lettermod(meta, l, 200, 150)";
          ";" = "lettermod(alt, ;, 200, 150)";
        };
        meta = {
          f1 = "f1";
          f2 = "f2";
          f3 = "f3";
          f4 = "f4";
          f5 = "f5";
          f6 = "f6";
          f7 = "f7";
          f8 = "f8";
          f9 = "f9";
          f10 = "f10";
          back = "f1";
          forward = "f2";
          refresh = "f3";
          zoom = "f4";
          scale = "f5";
          brightnessdown = "f6";
          brightnessup = "f7";
          mute = "f8";
          volumedown = "f9";
          volumeup = "f10";
          sleep = "f12";
        };
        alt = {
          backspace = "delete";
          meta = "capslock";
          brightnessdown = "kbdillumdown";
          brightnessup = "kbdillumup";
          f6 = "kbdillumdown";
          f7 = "kbdillumup";
        };
        control = {
          f5 = "print";
          scale = "print";
        };
        controlalt = {
          backspace = "C-A-delete";
        };
      };
    };
  };

  system.replaceDependencies.replacements = [
    {
      original = pkgs.alsa-ucm-conf;
      replacement = cb-ucm-conf;
    }
  ];

  services.pipewire.wireplumber.configPackages = [
    (pkgs.writeTextDir "share/wireplumber/main.lua.d/51-increase-headroom.lua" ''
      rule = {
        matches = {
          {
            { "node.name", "matches", "alsa_output.*" },
          },
        },
        apply_properties = {
          ["api.alsa.headroom"] = 4096,
        },
      }

      table.insert(alsa_monitor.rules,rule)
    '')
  ];
  boot = {
    extraModprobeConfig = ''
      options snd-intel-dspcfg dsp_driver=3
    '';
  };
}