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diff --git a/doc/manual/src/release-notes/rl-next.md b/doc/manual/src/release-notes/rl-next.md
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+++ b/doc/manual/src/release-notes/rl-next.md
@@ -14,3 +14,13 @@
* `nix build` has a new `--print-out-paths` flag to print the resulting output paths.
This matches the default behaviour of `nix-build`.
+
+* You can now specify which outputs of a derivation `nix` should
+ operate on using the syntax `installable^outputs`,
+ e.g. `nixpkgs#glibc^dev,static` or `nixpkgs#glibc^*`. By default,
+ `nix` will use the outputs specified by the derivation's
+ `meta.outputsToInstall` attribute if it exists, or all outputs
+ otherwise.
+
+ Selecting derivation outputs using the attribute selection syntax
+ (e.g. `nixpkgs#glibc.dev`) no longer works.