diff --git a/flake.nix b/flake.nix
index a712b3e..009aba1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,6 +3,7 @@
   outputs = { self, ... }: {
     overlays.default = final: prev: {
       glibcLocales = prev.glibcLocales.overrideAttrs (base: {
+        buildInputs = base.buildInputs ++ [ ./en_EU ];
         postPatch = base.postPatch + ''
           cp ${prev.lib.escapeShellArg ./en_EU} localedata/locales/en_EU
           echo 'en_EU.UTF-8/UTF-8 \' >>localedata/SUPPORTED