diff --git a/pkgs/development/ocaml-modules/ounit2/default.nix b/pkgs/development/ocaml-modules/ounit2/default.nix
index 7872edca5922..3b75428d0efb 100644
--- a/pkgs/development/ocaml-modules/ounit2/default.nix
+++ b/pkgs/development/ocaml-modules/ounit2/default.nix
@@ -1,22 +1,22 @@
 { lib, ocaml, buildDunePackage, fetchurl, seq, stdlib-shims, ncurses }:
 
 buildDunePackage rec {
-  minimumOCamlVersion = "4.04";
+  minimalOCamlVersion = "4.04";
 
   pname = "ounit2";
   version = "2.2.6";
 
-  useDune2 = lib.versionAtLeast ocaml.version "4.08";
+  duneVersion = if lib.versionAtLeast ocaml.version "4.08" then "2" else "1";
 
   src = fetchurl {
     url = "https://github.com/gildor478/ounit/releases/download/v${version}/ounit-${version}.tbz";
-    sha256 = "sha256-BpD7Hg6QoY7tXDVms8wYJdmLDox9UbtrhGyVxFphWRM=";
+    hash = "sha256-BpD7Hg6QoY7tXDVms8wYJdmLDox9UbtrhGyVxFphWRM=";
   };
 
   propagatedBuildInputs = [ seq stdlib-shims ];
 
   doCheck = true;
-  nativeCheckInputs = lib.optional (lib.versionOlder ocaml.version "4.07") ncurses;
+  checkInputs = lib.optional (lib.versionOlder ocaml.version "4.07") ncurses;
 
   meta = with lib; {
     homepage = "https://github.com/gildor478/ounit";