3 files changed, 6 insertions, 0 deletions
diff --git a/pkgs/development/ocaml-modules/macaddr/cstruct.nix b/pkgs/development/ocaml-modules/macaddr/cstruct.nix
index 991a77a6ba2..14323040892 100644
--- a/pkgs/development/ocaml-modules/macaddr/cstruct.nix
+++ b/pkgs/development/ocaml-modules/macaddr/cstruct.nix
@@ -7,6 +7,8 @@ buildDunePackage {
 
   inherit (macaddr) version src minimumOCamlVersion;
 
+  useDune2 = true;
+
   propagatedBuildInputs = [ macaddr cstruct ];
 
   doCheck = true;
diff --git a/pkgs/development/ocaml-modules/macaddr/default.nix b/pkgs/development/ocaml-modules/macaddr/default.nix
index 08b486bb683..5552393b408 100644
--- a/pkgs/development/ocaml-modules/macaddr/default.nix
+++ b/pkgs/development/ocaml-modules/macaddr/default.nix
@@ -6,6 +6,8 @@ buildDunePackage rec {
   pname = "macaddr";
   version = "5.0.1";
 
+  useDune2 = true;
+
   minimumOCamlVersion = "4.04";
 
   src = fetchurl {
diff --git a/pkgs/development/ocaml-modules/macaddr/sexp.nix b/pkgs/development/ocaml-modules/macaddr/sexp.nix
index 3d0305c4be3..35cc7c6b440 100644
--- a/pkgs/development/ocaml-modules/macaddr/sexp.nix
+++ b/pkgs/development/ocaml-modules/macaddr/sexp.nix
@@ -7,6 +7,8 @@ buildDunePackage {
 
   inherit (macaddr) version src minimumOCamlVersion;
 
+  useDune2 = true;
+
   propagatedBuildInputs = [ ppx_sexp_conv ];
 
   checkInputs = [ macaddr-cstruct ounit ];