diff --git a/pkgs/development/libraries/muparserx/default.nix b/pkgs/development/libraries/muparserx/default.nix
index ef6b254b8a37..4d3036d4cfbb 100644
--- a/pkgs/development/libraries/muparserx/default.nix
+++ b/pkgs/development/libraries/muparserx/default.nix
@@ -38,5 +38,7 @@ stdenv.mkDerivation rec {
     homepage = "https://beltoforion.de/en/muparserx/";
     license = licenses.bsd2;
     maintainers = with maintainers; [ drewrisinger ];
+    # selftest fails
+    broken = stdenv.isDarwin;
   };
 }