diff --git a/nixos/doc/manual/release-notes/rl-2605.section.md b/nixos/doc/manual/release-notes/rl-2605.section.md
index 576f3c6db4c4..d5a65d16fa33 100644
--- a/nixos/doc/manual/release-notes/rl-2605.section.md
+++ b/nixos/doc/manual/release-notes/rl-2605.section.md
@@ -135,6 +135,17 @@
 
 - `services.pyload` has been removed because the package it relies on does not exist anymore in nixpkgs due to vulnerabilities and being unmaintained.
 
+- Removed the ability from systemd to start units installed via `nix-env -i`.
+  This feature is hardly used and most units do not work without NixOS specific
+  changes anyways. Removing this allows us to drop a custom systemd patch
+  improving systemd maintainability and update speed.
+
+- Removed the ability from systemd to depend on open-yet-unformatted dm-crypt
+  devices as systemd device units. For example you cannot call systemd-makefs
+  on such devices. This was never implemented upstream but patched into
+  Nixpkgs's systemd. Removing this allows us to drop a custom systemd patch
+  improving systemd maintainability and update speed.
+
 - `linux_hardened` kernel has been removed due to a lack of maintenance.
 
 - `services.tandoor-recipes` now uses a sub-directory for media files by default starting with `26.05`. Existing setups should move media files out of the data directory and adjust `services.tandoor-recipes.extraConfig.MEDIA_ROOT` accordingly. See [Migrating media files for pre 26.05 installations](#module-services-tandoor-recipes-migrating-media).