gnu: Add rust-gsk4-0.8.

* gnu/packages/crates-gtk.scm (rust-gsk4-0.8): New variable.
(rust-gsk4-0.7): Inherit from rust-gsk4-0.8.

Change-Id: Ief5de9ea607e6dd2be132cf98b177ecb315fd5c1

gnu/packages/crates-gtk.scm

@@ -2651,8 +2651,38 @@
        #:cargo-development-inputs (("rust-shell-words" ,rust-shell-words-1)
                                    ("rust-tempfile" ,rust-tempfile-3))))))
 
+(define-public rust-gsk4-0.8
+  (package
+    (name "rust-gsk4")
+    (version "0.8.2")
+    (source
+     (origin
+       (method url-fetch)
+       (uri (crate-uri "gsk4" version))
+       (file-name (string-append name "-" version ".tar.gz"))
+       (sha256
+        (base32 "1gi1f9s2nd5m2zfwb91vijpzr6nxbfa58inrwml497wkyr5qhqvm"))))
+    (build-system cargo-build-system)
+    (arguments
+     `(#:cargo-inputs (("rust-cairo-rs" ,rust-cairo-rs-0.19)
+                       ("rust-gdk4" ,rust-gdk4-0.8)
+                       ("rust-glib" ,rust-glib-0.19)
+                       ("rust-graphene-rs" ,rust-graphene-rs-0.19)
+                       ("rust-gsk4-sys" ,rust-gsk4-sys-0.8)
+                       ("rust-libc" ,rust-libc-0.2)
+                       ("rust-pango" ,rust-pango-0.19))
+       #:cargo-development-inputs
+       (("rust-gir-format-check" ,rust-gir-format-check-0.1))))
+    (native-inputs (list pkg-config))
+    (inputs (list gtk))
+    (home-page "https://gtk-rs.org/")
+    (synopsis "Rust bindings of the GSK 4 library")
+    (description "Rust bindings of the GSK 4 library.")
+    (license license:expat)))
+
 (define-public rust-gsk4-0.7
   (package
+    (inherit rust-gsk4-0.8)
     (name "rust-gsk4")
     (version "0.7.3")
     (source
@@ -2662,7 +2692,6 @@
        (file-name (string-append name "-" version ".tar.gz"))
        (sha256
         (base32 "0zhzs2dkgiinhgc11akpn2harq3x5n1iq21dnc4h689g3lsqx58d"))))
-    (build-system cargo-build-system)
     (arguments
      `(#:tests? #f  ; `Errors` doesn't implement `std::fmt::Display`
        #:cargo-inputs (("rust-cairo-rs" ,rust-cairo-rs-0.18)
@@ -2673,13 +2702,7 @@
                        ("rust-libc" ,rust-libc-0.2)
                        ("rust-pango" ,rust-pango-0.18))
        #:cargo-development-inputs
-       (("rust-gir-format-check" ,rust-gir-format-check-0.1))))
+       (("rust-gir-format-check" ,rust-gir-format-check-0.1))))))
-    (native-inputs (list pkg-config))
-    (inputs (list gtk))
-    (home-page "https://gtk-rs.org/")
-    (synopsis "Rust bindings of the GSK 4 library")
-    (description "Rust bindings of the GSK 4 library.")
-    (license license:expat)))
 
 (define-public rust-gsk4-sys-0.8
   (package