gnu: Add rust-gumdrop-derive-0.8.

* gnu/packages/crates-io.scm (rust-gumdrop-derive-0.8): New variable.

Signed-off-by: Nicolas Goaziou <mail@nicolasgoaziou.fr>

gnu/packages/crates-io.scm

@@ -25518,6 +25518,29 @@ (define-public rust-groupable-0.2
      "This package aggregates groups of values from key-value iterators.")
     (license license:expat)))
 
+(define-public rust-gumdrop-derive-0.8
+  (package
+    (name "rust-gumdrop-derive")
+    (version "0.8.0")
+    (source (origin
+              (method url-fetch)
+              (uri (crate-uri "gumdrop_derive" version))
+              (file-name (string-append name "-" version ".tar.gz"))
+              (sha256
+               (base32
+                "01cdc7w5wf1g9i04ykcssczjmmnl6jky47a648sp710df5yg0pli"))))
+    (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/murarth/gumdrop")
+    (synopsis "Custom derive support for gumdrop")
+    (description "This package provides custom derive support for gumdrop.")
+    (license (list license:expat license:asl2.0))))
+
 (define-public rust-gzip-header-0.3
   (package
     (name "rust-gzip-header")