diff --git a/nixos/doc/manual/release-notes/rl-2311.section.md b/nixos/doc/manual/release-notes/rl-2311.section.md
index 4cf8d5ec6298..b990c20796ee 100644
--- a/nixos/doc/manual/release-notes/rl-2311.section.md
+++ b/nixos/doc/manual/release-notes/rl-2311.section.md
@@ -437,6 +437,8 @@ The module update takes care of the new config syntax and the data itself (user
 
 - `python3.pkgs.flitBuildHook` has been removed. Use `flit-core` and `format = "pyproject"` instead.
 
+- The `extend` function of `llvmPackages` has been removed due it coming from the `tools` attrset thus only extending the `tool` attrset. A possible replacement is to construct the set from `libraries` and `tools`, or patch nixpkgs.
+
 - The `qemu-vm.nix` module now supports disabling overriding `fileSystems` with
   `virtualisation.fileSystems`. This enables the user to boot VMs from
   "external" disk images not created by the qemu-vm module. You can stop the