diff --git a/pkgs/development/python-modules/sphinx-navtree/default.nix b/pkgs/development/python-modules/sphinx-navtree/default.nix
index 02e5711e888f..ae56a9fdce11 100644
--- a/pkgs/development/python-modules/sphinx-navtree/default.nix
+++ b/pkgs/development/python-modules/sphinx-navtree/default.nix
@@ -14,5 +14,7 @@ buildPythonPackage rec {
     description = "Navigation tree customization for Sphinx";
     homepage = "https://github.com/bintoro/sphinx-navtree";
     license = lib.licenses.mit;
+    # not compatible with sphinx 3.3, not updated since 2016
+    broken = true;
   };
 }