diff --git a/pkgs/development/ocaml-modules/uunf/default.nix b/pkgs/development/ocaml-modules/uunf/default.nix
index 951c1f203b2..4b0ce9e899c 100644
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@@ -29,5 +29,6 @@ stdenv.mkDerivation rec {
     platforms = ocaml.meta.platforms or [];
     license = licenses.bsd3;
     maintainers = [ maintainers.vbgl ];
+    broken = stdenv.isAarch64;
   };
 }