diff --git a/machine.nix b/machine.nix
index c3d7e77..5a125a8 100644
--- a/machine.nix
+++ b/machine.nix
@@ -2,6 +2,6 @@
 {
   options.machine = lib.mkOption {
     description = "The machine hostname to configure for";
-    type = lib.types.enum [ "earth" "fire" "air" "water" ];
+    type = lib.types.str;
   };
 }