{
  config,
  lib,
  pkgs,
  ...
}:

{
  imports = [ ];

  options.me = {
    build_in_ram.enable = lib.mkOption {
      type = lib.types.bool;
      default = false;
      example = true;
      description = "Whether we want to install build_in_ram.";
    };
  };

  config = lib.mkIf config.me.build_in_ram.enable (
    lib.mkMerge [
      {
        # Nix 2.30.0 (2025-07-07) changed the build directory from /tmp to /nix/var/nix/builds which broke a number of builds because my ZFS datasets were utf8only.
        fileSystems."/nix/var/nix/builds" = {
          device = "tmpfs";
          fsType = "tmpfs";
          options = [
            "size=40G" # adjust for your situation and needs
            "mode=700"
          ];
        };
      }
    ]
  );
}