doc: cookbook: Add new prepare-rust-crates phase.

* doc/guix-cookbook.texi (Using Rust Libraries in Other Build Systems): Add
new prepare-rust-crates phase introduced in commit
3691bb640d33150d2ff3f8194e6f157325a8d5e4.

Change-Id: I98ca9757d32db73ce94048a0c9f08ce2288bffb0
Signed-off-by: Efraim Flashner <efraim@flashner.co.il>

1 files changed, 2 insertions, 1 deletions

diff --git a/doc/guix-cookbook.texi b/doc/guix-cookbook.texi
index d1d12f66d2a..1970eb7dbb2 100644
--- a/doc/guix-cookbook.texi
+++ b/doc/guix-cookbook.texi
@@ -1998,7 +1998,8 @@ set @code{#:cargo-target} for @code{cargo-build-system}'s build phases.
                              ;; For cross-compilation.
                              #:cargo-target #$(cargo-triplet)
                              args))
-                    '(unpack-rust-crates
+                    '(prepare-rust-crates
+                      unpack-rust-crates
                       configure
                       check-for-pregenerated-files
                       patch-cargo-checksums)))))))