diff --git a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
index 78bd6c6a22d8..7355c1d4b7b2 100644
--- a/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
+++ b/nixos/doc/manual/from_md/release-notes/rl-2211.section.xml
@@ -130,6 +130,15 @@
           certificates by default.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          Improved performances of
+          <literal>lib.closePropagation</literal> which was previously
+          quadratic. This is used in e.g.
+          <literal>ghcWithPackages</literal>. Please see backward
+          incompatibilities notes below.
+        </para>
+      </listitem>
       <listitem>
         <para>
           Cinnamon has been updated to 5.4. While at it, the cinnamon
@@ -546,6 +555,12 @@
           notes</link>.
         </para>
       </listitem>
+      <listitem>
+        <para>
+          <literal>lib.closePropagation</literal> now needs that all
+          gathered sets have an <literal>outPath</literal> attribute.
+        </para>
+      </listitem>
       <listitem>
         <para>
           lemmy module option
diff --git a/nixos/doc/manual/release-notes/rl-2211.section.md b/nixos/doc/manual/release-notes/rl-2211.section.md
index 37b0db8a8ce1..94a04434b30f 100644
--- a/nixos/doc/manual/release-notes/rl-2211.section.md
+++ b/nixos/doc/manual/release-notes/rl-2211.section.md
@@ -52,6 +52,8 @@ In addition to numerous new and upgraded packages, this release has the followin
 
 - Perl has been updated to 5.36, and its core module `HTTP::Tiny` was patched to verify SSL/TLS certificates by default.
 
+- Improved performances of `lib.closePropagation` which was previously quadratic. This is used in e.g. `ghcWithPackages`. Please see backward incompatibilities notes below.
+
 - Cinnamon has been updated to 5.4. While at it, the cinnamon module now defaults to
   blueman as bluetooth manager and slick-greeter as lightdm greeter to match upstream.
 
@@ -182,6 +184,8 @@ Available as [services.patroni](options.html#opt-services.patroni.enable).
 
 - `teleport` has been upgraded to major version 10. Please see upstream [upgrade instructions](https://goteleport.com/docs/ver/10.0/management/operations/upgrading/) and [release notes](https://goteleport.com/docs/ver/10.0/changelog/#1000).
 
+- `lib.closePropagation` now needs that all gathered sets have an `outPath` attribute.
+
 - lemmy module option `services.lemmy.settings.database.createLocally`
   moved to `services.lemmy.database.createLocally`.