{ pkgs, lib, role, ... }:
{
  imports =
    [ ./common.nix ]
    ++ lib.optional pkgs.stdenv.isDarwin ./darwin.nix
    ++ lib.optional pkgs.stdenv.isLinux ./linux.nix
    ++ lib.optional (role == "workstation") ./workstation.nix
    ++ lib.optional (role == "server") ./server.nix;
}