diff --git a/pkgs/development/ocaml-modules/mirage-net/default.nix b/pkgs/development/ocaml-modules/mirage-net/default.nix
index bc7ae7d96b3..bf4992df76f 100644
--- a/pkgs/development/ocaml-modules/mirage-net/default.nix
+++ b/pkgs/development/ocaml-modules/mirage-net/default.nix
@@ -6,11 +6,11 @@ buildDunePackage rec {
   pname = "mirage-net";
   version = "4.0.0";
 
-  useDune2 = true;
+  duneVersion = "3";
 
   src = fetchurl {
     url = "https://github.com/mirage/mirage-net/releases/download/v${version}/mirage-net-v${version}.tbz";
-    sha256 = "sha256-Zo7/0Ye4GgqzJFCHDBXbuJ/5ETl/8ziolRgH4lDhlM4=";
+    hash = "sha256-Zo7/0Ye4GgqzJFCHDBXbuJ/5ETl/8ziolRgH4lDhlM4=";
   };
 
   propagatedBuildInputs = [ cstruct fmt lwt macaddr mirage-device ];