diff --git a/pkgs/gamja.nix b/pkgs/gamja.nix
index 8c4bd07..f5ffd74 100644
--- a/pkgs/gamja.nix
+++ b/pkgs/gamja.nix
@@ -52,7 +52,7 @@ in
               -regextype posix-extended \
               -iregex '.*\.(css|js|json|map|webmanifest|html)' | \
             tee >(xargs -n1 -P''$(nproc) ${zopfli}/bin/zopfli) | \
-                  xargs -n1 -P''$(nproc) ${brotli}/bin/brotli
+                  xargs -n1 -P''$(nproc) ${brotli}/bin/brotli --no-copy-stat
       '';
     };