ocamlPackages.ppx_show: migrate to finalAttrs

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

@@ -6,14 +6,14 @@
   ppxlib,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "ppx_show";
   version = "0.2.1";
 
   src = fetchFromGitHub {
     owner = "thierry-martinez";
-    repo = pname;
-    rev = "v${version}";
+    repo = "ppx_show";
+    rev = "v${finalAttrs.version}";
     sha256 = "sha256-YwWAdOtb0zg2hqNkGRiigz/Pci8Jy/QD+WyUEohEsns=";
   };
 
@@ -23,9 +23,9 @@ buildDunePackage rec {
   ];
 
   meta = {
-    homepage = "https://github.com/thierry-martinez/${pname}";
+    homepage = "https://github.com/thierry-martinez/ppx_show";
     description = "OCaml PPX deriver for deriving show based on ppxlib";
     license = lib.licenses.bsd2;
     maintainers = with lib.maintainers; [ niols ];
   };
-}
+})