{
  config,
  lib,
  pkgs,
  ...
}:
with lib;
let
  cfg = config.nixfiles.modules.games.steam-run;
in
{
  options.nixfiles.modules.games.steam-run = {
    enable = mkEnableOption "native Steam runtime";

    quirks = {
      blackIsleStudios = mkEnableOption "fixes for games from Black Isle Studios";
      cryptOfTheNecrodancer = mkEnableOption ''fixes for "Crypt of the NecroDancer" issues'';
      mountAndBladeWarband = mkEnableOption ''fixes for "Mount & Blade: Warband" issues'';
    };
  };

  config = mkIf cfg.enable {
    nixfiles.modules = {
      common.nix.allowedUnfreePackages = [
        "steam"
        "steam-run"
      ];

      games = {
        enable32BitSupport = true;
        gamemode.enable = true;
        mangohud.enable = true;
      };
    };

    hm.home.packages = with pkgs; [
      (steam.override {
        extraLibraries =
          _:
          with cfg.quirks;
          optional blackIsleStudios openssl_1_0_0
          ++ optionals cryptOfTheNecrodancer [
            (import (builtins.fetchTarball {
              url = "https://github.com/NixOS/nixpkgs/archive/d1c3fea7ecbed758168787fe4e4a3157e52bc808.tar.gz";
              sha256 = "0ykm15a690v8lcqf2j899za3j6hak1rm3xixdxsx33nz7n3swsyy";
            }) { inherit (config.nixpkgs) config localSystem; }).flac
          ]
          ++ optionals mountAndBladeWarband [
            (glew.overrideAttrs (
              _: super:
              let
                opname = super.pname;
              in
              rec {
                pname = "${opname}-steam-run-fix";
                inherit (super) version;
                src = fetchurl {
                  url = "mirror://sourceforge/${opname}/${opname}-${version}.tgz";
                  hash = "sha256-BN6R5+Z2MDm8EZQAlc2cf4gLq6ghlqd2X3J6wFqZPJU=";
                };
              }
            ))
            (fmodex.overrideAttrs (
              _: super:
              let
                opname = super.pname;
              in
              rec {
                pname = "${opname}-steam-run-fix";
                inherit (super) version;
                installPhase =
                  let
                    libPath = makeLibraryPath [
                      alsa-lib
                      libpulseaudio
                      stdenv.cc.cc
                    ];
                  in
                  ''
                    install -Dm755 api/lib/libfmodex64-${version}.so $out/lib/libfmodex64.so
                    patchelf --set-rpath ${libPath} $out/lib/libfmodex64.so
                  '';
              }
            ))
          ];
      }).run
    ];
  };
}