Merge branch 'master' into paths-from-stdin

doc/manual/src/installation/prerequisites-source.md

@@ -71,3 +71,8 @@
     <http://libcpuid.sourceforge.net>.
     This is an optional dependency and can be disabled
     by providing a `--disable-cpuid` to the `configure` script.
+
+  - Unless `./configure --disable-tests` is specified, GoogleTest (GTest) and
+    RapidCheck are required, which are available at
+    <https://google.github.io/googletest/> and
+    <https://github.com/emil-e/rapidcheck> respectively.

doc/manual/src/release-notes/rl-next.md

@@ -3,3 +3,20 @@
 * Commands which take installables on the command line can now read them from the standard input if
   passed the `--stdin` flag. This is primarily useful when you have a large amount of paths which
   exceed the OS arg limit.
+
+* The special handling of an [installable](../command-ref/new-cli/nix.md#installables) with `.drv` suffix being interpreted as all of the given [store derivation](../glossary.md#gloss-store-derivation)'s output paths is removed, and instead taken as the literal store path that it represents.
+
+  The new `^` syntax for store paths introduced in Nix 2.13 allows explicitly referencing output paths of a derivation.
+  Using this is better and more clear than relying on the now-removed `.drv` special handling.
+
+  For example,
+  ```shell-session
+  $ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv
+  ```
+
+  now gives info about the derivation itself, while
+
+  ```shell-session
+  $ nix path-info /nix/store/gzaflydcr6sb3567hap9q6srzx8ggdgg-glibc-2.33-78.drv^*
+  ```
+  provides information about each of its outputs.