diff --git a/flake.nix b/flake.nix
index 1ffefc2..bad7c92 100644
--- a/flake.nix
+++ b/flake.nix
@@ -14,6 +14,7 @@
         pkgs.mkShellNoCC {
           LOCALE_ARCHIVE = "${pkgs.glibcLocales}/lib/locale/locale-archive";
           packages = with pkgs; [
+            xxHash
             hugo
             brotli
             zopfli