buildDunePackage: new support function; use it to refactor some OCaml derivations

pkgs/development/tools/ocaml/ocaml-top/default.nix

@@ -1,33 +1,25 @@
-{ stdenv, fetchzip, ncurses
-, ocamlPackages
-, dune
-}:
+{ stdenv, fetchzip, ncurses, ocamlPackages }:
 
-stdenv.mkDerivation rec {
+with ocamlPackages; buildDunePackage rec {
+  pname = "ocaml-top";
   version = "1.1.5";
-  name = "ocaml-top-${version}";
+
   src = fetchzip {
     url = "https://github.com/OCamlPro/ocaml-top/archive/${version}.tar.gz";
     sha256 = "1d4i6aanrafgrgk4mh154k6lkwk0b6mh66rykz33awlf5pfqd8yv";
   };
 
-  buildInputs = [ ncurses dune ]
-  ++ (with ocamlPackages; [ ocaml ocp-build findlib lablgtk ocp-index ]);
+  buildInputs = [ ncurses ocp-build lablgtk ocp-index ];
 
   configurePhase = ''
     export TERM=xterm
     ocp-build -init
   '';
 
-  buildPhase = "jbuilder build";
-
-  inherit (dune) installPhase;
-
   meta = {
     homepage = https://www.typerex.org/ocaml-top.html;
     license = stdenv.lib.licenses.gpl3;
     description = "A simple cross-platform OCaml code editor built for top-level evaluation";
-    platforms = ocamlPackages.ocaml.meta.platforms or [];
     maintainers = with stdenv.lib.maintainers; [ vbgl ];
   };
 }