diff --git a/nixos/modules/mail.nix b/nixos/modules/mail.nix
index 4d7f950..25b6b7e 100644
--- a/nixos/modules/mail.nix
+++ b/nixos/modules/mail.nix
@@ -24,7 +24,7 @@
     mkEnableOption
     mkOption
     ;
-  inherit (lib.types) listOf strMatching nonEmptyStr path;
+  inherit (lib.types) listOf strMatching str path;
   cfg = config.services.mathebau-mail;
 in {
   options.services.mathebau-mail = {