diff --git a/flake.nix b/flake.nix
index f1574786..a3e69a6f 100644
--- a/flake.nix
+++ b/flake.nix
@@ -166,7 +166,7 @@
                   );
                 enterShell = ''
                   export LOCALES="${cldr}/priv/cldr";
-                  export ELIXIR_ERL_OPTIONS="+fnu";
+                  export LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
                   export PORT="4000"
                   export ENCRYPTION_KEY="your_secure_encryption_key_here"
                   export DATABASE_USER="teslamate"