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

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

@@ -1,37 +1,26 @@
-{ stdenv, fetchFromGitHub, ocaml, findlib, dune, alcotest, result
-, bigstringaf
-}:
+{ stdenv, fetchFromGitHub, buildDunePackage, alcotest, result, bigstringaf }:
 
-if !stdenv.lib.versionAtLeast ocaml.version "4.03"
-then throw "angstrom is not available for OCaml ${ocaml.version}"
-else
-
-stdenv.mkDerivation rec {
+buildDunePackage rec {
+  pname = "angstrom";
   version = "0.10.0";
-  name = "ocaml${ocaml.version}-angstrom-${version}";
+
+  minimumOCamlVersion = "4.03";
 
   src = fetchFromGitHub {
     owner  = "inhabitedtype";
-    repo   = "angstrom";
-    rev    = "${version}";
+    repo   = pname;
+    rev    = version;
     sha256 = "0lh6024yf9ds0nh9i93r9m6p5psi8nvrqxl5x7jwl13zb0r9xfpw";
   };
 
-  buildInputs = [ ocaml findlib dune alcotest ];
+  buildInputs = [ alcotest ];
   propagatedBuildInputs = [ bigstringaf result ];
-
-  buildPhase = "dune build -p angstrom";
-
   doCheck = true;
-  checkPhase = "dune runtest -p angstrom";
-
-  inherit (dune) installPhase;
 
   meta = {
     homepage = https://github.com/inhabitedtype/angstrom;
     description = "OCaml parser combinators built for speed and memory efficiency";
     license = stdenv.lib.licenses.bsd3;
     maintainers = with stdenv.lib.maintainers; [ sternenseemann ];
-    inherit (ocaml.meta) platforms;
   };
 }