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

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

@@ -1,26 +1,22 @@
-{ stdenv, fetchFromGitHub, ocaml, findlib, dune, cppo
-, bos, cmdliner, tyxml
-}:
+{ stdenv, fetchFromGitHub, buildDunePackage, cppo, bos, cmdliner, tyxml }:
 
-stdenv.mkDerivation rec {
-  name = "ocaml${ocaml.version}-odoc-${version}";
+buildDunePackage rec {
+  pname = "odoc";
   version = "1.3.0";
+
   src = fetchFromGitHub {
     owner = "ocaml";
-    repo = "odoc";
+    repo = pname;
     rev = version;
     sha256 = "0hjan5aj5zk8j8qyagv9r4hqm469mh207cv2m6kxwgnw0c3cz7sy";
   };
 
-  buildInputs = [ ocaml findlib dune cppo bos cmdliner tyxml ];
-
-  inherit (dune) installPhase;
+  buildInputs = [ cppo bos cmdliner tyxml ];
 
   meta = {
     description = "A documentation generator for OCaml";
     license = stdenv.lib.licenses.isc;
     maintainers = [ stdenv.lib.maintainers.vbgl ];
-    inherit (ocaml.meta) platforms;
     inherit (src.meta) homepage;
   };
 }