ocamlPackages.zmq: use Dune 2

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

@@ -1,9 +1,12 @@
-{ lib, fetchFromGitHub, buildDunePackage, czmq, stdint }:
+{ lib, fetchFromGitHub, buildDunePackage, dune-configurator, czmq, stdint }:
 
 buildDunePackage rec {
   minimumOCamlVersion = "4.03";
   pname = "zmq";
   version = "20180726";
+
+  useDune2 = true;
+
   src = fetchFromGitHub {
     owner = "issuu";
     repo = "ocaml-zmq";
@@ -11,7 +14,7 @@ buildDunePackage rec {
     sha256 = "1f5l4bw78y4drabhyvmpj3z8k30bill33ca7bzhr02m55yf6gqpf";
   };
 
-  buildInputs = [ czmq ];
+  buildInputs = [ czmq dune-configurator ];
 
   propagatedBuildInputs = [ stdint ];
 

pkgs/development/ocaml-modules/zmq/lwt.nix

@@ -2,7 +2,7 @@
 
 buildDunePackage {
   pname = "zmq-lwt";
-  inherit (zmq) version src meta;
+  inherit (zmq) version src useDune2 meta;
 
   propagatedBuildInputs = [ zmq ocaml_lwt ];
 }