{ lib, ... }: {
  programs.steam.enable = true;

  nixpkgs.config = {
    allowUnfreePredicate = pkg:
      builtins.elem (lib.getName pkg) [
        "steam"
        "steam-original"
        "steam-runtime"
      ];
    packageOverrides = pkgs: {
      steam =
        pkgs.steam.override { extraPkgs = pkgs: with pkgs; [ libgdiplus ]; };
    };
  };

  environment.sessionVariables = rec {
    # Steam needs this to find Proton-GE
    STEAM_EXTRA_COMPAT_TOOLS_PATHS =
      "\${HOME}/.steam/root/compatibilitytools.d";
    # note: this doesn't replace PATH, it just adds this to it
    PATH = [ "\${XDG_BIN_HOME}" ];
  };
}