ocamlPackages.gd: migrate to finalAttrs

pkgs/development/ocaml-modules/gd/default.nix

@@ -6,14 +6,14 @@
   gd,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "gd";
   version = "1.1";
 
   src = fetchFromGitHub {
     owner = "savonet";
     repo = "ocaml-gd";
-    rev = "v${version}";
+    rev = "v${finalAttrs.version}";
     sha256 = "sha256-78cqxVEappTybRLk7Y6vW1POvZKFIxtGNVcmkKq9GEE=";
   };
 
@@ -26,4 +26,4 @@ buildDunePackage rec {
     license = lib.licenses.lgpl21Only;
     maintainers = with lib.maintainers; [ dandellion ];
   };
-}
+})