diff --git a/nix/home-manager.nix b/nix/home-manager.nix
index c21b1cd..96c5217 100644
--- a/nix/home-manager.nix
+++ b/nix/home-manager.nix
@@ -11,7 +11,7 @@ flake: {
        enable = lib.mkEnableOption
          "Enable emacs configuration managed by twist";
        directory = lib.mkOption {
-         type = types.str;
+         type = lib.types.str;
          description = "Relative path in string to user-emacs-directory from the home directory";
          default = "${config.xdg.configHome}/emacs";
          example = ".local/share/emacs";