diff --git a/doc/manual/src/release-notes/rl-2.5.md b/doc/manual/src/release-notes/rl-2.5.md
index a95208b9e..9a29938c2 100644
--- a/doc/manual/src/release-notes/rl-2.5.md
+++ b/doc/manual/src/release-notes/rl-2.5.md
@@ -1,3 +1,5 @@
 # Release 2.5 (2021-XX-XX)
 
 * Binary cache stores now have a setting `compression-level`.
+
+* `nix develop` now has a flag `--unpack` to run `unpackPhase`.