diff --git a/pkgs/development/python-modules/reactivex/default.nix b/pkgs/development/python-modules/reactivex/default.nix
index d09aebab8814..af91ed442274 100644
--- a/pkgs/development/python-modules/reactivex/default.nix
+++ b/pkgs/development/python-modules/reactivex/default.nix
@@ -5,6 +5,7 @@
   poetry-core,
   pytest-asyncio,
   pytestCheckHook,
+  pythonAtLeast,
   typing-extensions,
 }:
 
@@ -13,6 +14,9 @@ buildPythonPackage rec {
   version = "4.1.0";
   pyproject = true;
 
+  # https://github.com/ReactiveX/RxPY/issues/737
+  disabled = pythonAtLeast "3.14";
+
   src = fetchFromGitHub {
     owner = "ReactiveX";
     repo = "RxPY";