gnu: Add rust-rkyv-derive-0.6.

* gnu/packages/crates-io.scm (rust-rkyv-derive-0.6): New variable.

gnu/packages/crates-io.scm

@@ -43632,6 +43632,30 @@ (define-public rust-rustyline-derive-0.2
         (base32
          "1n3iw9kaq70dw1rvvma0gjwydbj0f2mvvqvrva69f5cl6yv1dnd0"))))))
 
+(define-public rust-rkyv-derive-0.6
+  (package
+    (name "rust-rkyv-derive")
+    (version "0.6.7")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "rkyv_derive" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1mc7rnps41gdywahsffqlypsp9jqmp0r6hlh2nxm31bddfgli3xs"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-proc-macro2" ,rust-proc-macro2-1)
+        ("rust-quote" ,rust-quote-1)
+        ("rust-syn" ,rust-syn-1))))
+    (home-page "https://github.com/rkyv/rkyv")
+    (synopsis "Derive macro for zero-copy deserialization framework")
+    (description "This package provides a Derive macro for the rkyv
+deserialization framework.")
+    (license license:expat)))
+
 (define-public rust-ryu-1
   (package
     (name "rust-ryu")