gnu: Add rust-zvariant-derive-3.

* gnu/packages/crates-io.scm (rust-zvariant-derive-3): New variable.

gnu/packages/crates-io.scm

@@ -79001,6 +79001,36 @@ compression library.")
 in Pure Rust.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-zvariant-derive-3
+  (package
+    (name "rust-zvariant-derive")
+    (version "3.15.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "zvariant-derive" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "1kcfgpqshggr5v7dwldjggix79zcyj7fizw7dkh6w39iziyplkck"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:tests? #f      ; Needs unstable features.
+       #:cargo-inputs
+       (("rust-proc-macro-crate" ,rust-proc-macro-crate-1)
+        ("rust-proc-macro2" ,rust-proc-macro2-1)
+        ("rust-quote" ,rust-quote-1)
+        ("rust-syn" ,rust-syn-1)
+        ("rust-zvariant-utils" ,rust-zvariant-utils-1))
+       #:cargo-development-inputs
+       (("rust-byteorder" ,rust-byteorder-1)
+        ("rust-enumflags2" ,rust-enumflags2-0.7)
+        ("rust-serde" ,rust-serde-1)
+        ("rust-serde-repr" ,rust-serde-repr-0.1))))
+    (home-page "https://github.com/dbus2/zbus/")
+    (synopsis "D-Bus & GVariant encoding & decoding")
+    (description "D-Bus & GVariant encoding & decoding")
+    (license license:expat)))
+
 ;;;
 ;;; Avoid adding new packages to the end of this file. To reduce the chances
 ;;; of a merge conflict, place them above by existing packages with similar