gnu: Add rust-prost-0.9.

* gnu/packages/crates-io.scm (rust-prost-0.9): New variable.
(rust-prost-derive-0.9): New variable.

gnu/packages/crates-io.scm

@@ -39692,6 +39692,57 @@ including most strategies and the testing framework itself.")
 trait of proptest.")
     (license (list license:expat license:asl2.0))))
 
+(define-public rust-prost-derive-0.9
+  (package
+    (name "rust-prost-derive")
+    (version "0.9.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "prost-derive" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1zi0qway5anz5ik3k1yrc2av81sjcqvqy9lnivv0nzp0ccr1mk7r"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-anyhow" ,rust-anyhow-1)
+        ("rust-itertools" ,rust-itertools-0.10)
+        ("rust-proc-macro2" ,rust-proc-macro2-1)
+        ("rust-quote" ,rust-quote-1)
+        ("rust-syn" ,rust-syn-1))))
+    (home-page "https://github.com/tokio-rs/prost")
+    (synopsis "Protocol Buffers implementation for the Rust language")
+    (description
+     "This package provides a Protocol Buffers implementation for the Rust
+language.")
+    (license license:asl2.0)))
+
+(define-public rust-prost-0.9
+  (package
+    (name "rust-prost")
+    (version "0.9.0")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "prost" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "00b0xfn80alw7h2pzr2z4dycyvsys4h5878sifaq9zdlbhkpjj24"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:skip-build? #t
+       #:cargo-inputs
+       (("rust-bytes" ,rust-bytes-1)
+        ("rust-prost-derive" ,rust-prost-derive-0.9))))
+    (home-page "https://github.com/tokio-rs/prost")
+    (synopsis "Protocol Buffers implementation for the Rust language")
+    (description
+     "This package provides a Protocol Buffers implementation for the Rust
+language.")
+    (license license:asl2.0)))
+
 (define-public rust-psl-2
   (package
     (name "rust-psl")