{
  lib,
  config,
  ...
}:
let
  cfg = config.modules.tempBuildStorage;
in
{
  options.modules.tempBuildStorage = {
    enable = lib.mkEnableOption "temporary build storage volume";

    device = lib.mkOption {
      type = lib.types.str;
      default = "/dev/sdb";
      description = "Block device to mount for temporary nix build storage.";
    };

    mountPoint = lib.mkOption {
      type = lib.types.str;
      default = "/mnt/build";
      description = "Mount point for the temporary build storage.";
    };
  };

  config = lib.mkIf cfg.enable {
    fileSystems.${cfg.mountPoint} = {
      device = cfg.device;
      fsType = "ext4";
      options = [
        "nofail"
        "defaults"
      ];
    };

    nix.settings.build-dir = cfg.mountPoint;
  };
}