diff --git a/nixos/doc/manual/release-notes/rl-2411.section.md b/nixos/doc/manual/release-notes/rl-2411.section.md
index 81c0e9826e26..79d18f9a8998 100644
--- a/nixos/doc/manual/release-notes/rl-2411.section.md
+++ b/nixos/doc/manual/release-notes/rl-2411.section.md
@@ -96,6 +96,11 @@
 
 - `nginx` package no longer includes `gd` and `geoip` dependencies. For enabling it, override `nginx` package with the optionals `withImageFilter` and `withGeoIP`.
 
+- `systemd.enableUnifiedCgroupHierarchy` option has been removed.
+  In systemd 256 support for cgroup v1 ('legacy' and 'hybrid' hierarchies) is now considered obsolete and systemd by default will refuse to boot under it.
+  To forcibly reenable cgroup v1 support, you can `set boot.kernelParams = [ "systemd.unified_cgroup_hierachy=0" "SYSTEMD_CGROUP_ENABLE_LEGACY_FORCE=1" ]`.
+  NixOS does not officially support this configuration and might cause your system to be unbootable in future versions. You are on your own.
+
 - `openssh` and `openssh_hpn` are now compiled without Kerberos 5 / GSSAPI support in an effort to reduce the attack surface of the components for the majority of users. Users needing this support can
   use the new `opensshWithKerberos` and `openssh_hpnWithKerberos` flavors (e.g. `programs.ssh.package = pkgs.openssh_gssapi`).