diff --git a/pkgs/development/ocaml-modules/opam-format/default.nix b/pkgs/development/ocaml-modules/opam-format/default.nix
index 1360c6281636..00d0b146fb71 100644
--- a/pkgs/development/ocaml-modules/opam-format/default.nix
+++ b/pkgs/development/ocaml-modules/opam-format/default.nix
@@ -1,19 +1,14 @@
-{ lib, buildDunePackage, unzip, opam-core, opam-file-format }:
+{ lib, buildDunePackage, opam-core, opam-file-format }:
 
 buildDunePackage rec {
   pname = "opam-format";
 
-  useDune2 = true;
-
   inherit (opam-core) src version;
 
-  minimalOCamlVersion = "4.02.3";
-
   # get rid of check for curl at configure time
   # opam-format does not call curl at run time
   configureFlags = [ "--disable-checks" ];
 
-  nativeBuildInputs = [ unzip ];
   propagatedBuildInputs = [ opam-core opam-file-format ];
 
   meta = opam-core.meta // {
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index a45a12c0d31f..da8b7108816d 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1384,9 +1384,7 @@ let
 
     opam-file-format = callPackage ../development/ocaml-modules/opam-file-format { };
 
-    opam-format = callPackage ../development/ocaml-modules/opam-format {
-      inherit (pkgs) unzip;
-    };
+    opam-format = callPackage ../development/ocaml-modules/opam-format { };
 
     opam-repository = callPackage ../development/ocaml-modules/opam-repository { };