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

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

@@ -1,34 +1,25 @@
-{ stdenv, fetchFromGitHub, ocaml, findlib, dune, alcotest }:
+{ stdenv, fetchFromGitHub, buildDunePackage, alcotest }:
 
-if !stdenv.lib.versionAtLeast ocaml.version "4.02"
-then throw "faraday is not available for OCaml ${ocaml.version}"
-else
-
-stdenv.mkDerivation rec {
-  name = "ocaml${ocaml.version}-faraday-${version}";
+buildDunePackage rec {
+  pname = "faraday";
   version = "0.5.0";
 
+  minimumOCamlVersion = "4.02";
+
   src = fetchFromGitHub {
     owner = "inhabitedtype";
-    repo = "faraday";
+    repo = pname;
     rev = version;
     sha256 = "1kql0il1frsbx6rvwqd7ahi4m14ik6la5an6c2w4x7k00ndm4d7n";
   };
 
-  buildInputs = [ ocaml findlib dune alcotest ];
-
-  buildPhase = "dune build -p faraday";
-
+  buildInputs = [ alcotest ];
   doCheck = true;
-  checkPhase = "jbuilder runtest";
-
-  inherit (dune) installPhase;
 
   meta = {
     description = "Serialization library built for speed and memory efficiency";
     license = stdenv.lib.licenses.bsd3;
     maintainers = [ stdenv.lib.maintainers.vbgl ];
     inherit (src.meta) homepage;
-    inherit (ocaml.meta) platforms;
   };
 }