diff --git a/nixos/doc/manual/release-notes/rl-2103.xml b/nixos/doc/manual/release-notes/rl-2103.xml
index 94e42369b60..cabc60a157a 100644
--- a/nixos/doc/manual/release-notes/rl-2103.xml
+++ b/nixos/doc/manual/release-notes/rl-2103.xml
@@ -418,6 +418,26 @@ http://some.json-exporter.host:7979/probe?target=https://example.com/some/json/e
SDK licenses if your project requires it. See the androidenv documentation for more details.
+
+
+ The attribute mpi is now consistently used to
+ provide a default, system-wide MPI implementation.
+ The default implementation is openmpi, which has been used before by
+ all derivations affects by this change.
+ Note that all packages that have used mpi ? null in the input
+ for optional MPI builds, have been changed to the boolean input paramater
+ useMpi to enable building with MPI.
+
+ Building all packages with mpich instead
+ of the default openmpi can now be achived like this:
+
+self: super:
+{
+ mpi = super.mpich;
+}
+
+
+
The Searx module has been updated with the ability to configure the