diff --git a/flake.nix b/flake.nix
index 9d558a2..1eb6bb3 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,8 +16,6 @@
           (d: sub.${d} == "directory")
           (builtins.attrNames sub);
 
-      vowelStart = str: builtins.elem (builtins.substring 0 1 str) [ "a" "e" "i" "o" "u" ];
-
       concatMapAttrs = func: attr:
         builtins.foldl' (x: y: x // y) {}
           (builtins.map func attr);