diff --git a/pkgs/development/ocaml-modules/uunf/default.nix b/pkgs/development/ocaml-modules/uunf/default.nix
index b71442a6a8b3..073e6865fcdd 100644
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@@ -22,6 +22,8 @@ stdenv.mkDerivation {
 
   propagatedBuildInputs = [ uchar ];
 
+  prePatch = lib.optionalString stdenv.isAarch64 "ulimit -s 16384";
+
   inherit (topkg) buildPhase installPhase;
 
   meta = with lib; {