diff --git a/pkgs/development/ocaml-modules/encore/default.nix b/pkgs/development/ocaml-modules/encore/default.nix
index 7c15edabd58..fc54eb1a478 100644
--- a/pkgs/development/ocaml-modules/encore/default.nix
+++ b/pkgs/development/ocaml-modules/encore/default.nix
@@ -1,7 +1,6 @@
 { lib
 , buildDunePackage
 , fetchurl
-, ocaml
 , fmt
 , bigstringaf
 , angstrom
@@ -12,14 +11,14 @@ buildDunePackage rec {
   pname = "encore";
   version = "0.8";
 
-  minimumOCamlVersion = "4.07";
+  minimalOCamlVersion = "4.08";
 
   src = fetchurl {
     url = "https://github.com/mirage/encore/releases/download/v${version}/encore-v${version}.tbz";
     sha256 = "a406bc9863b04bb424692045939d6c170a2bb65a98521ae5608d25b0559344f6";
   };
 
-  useDune2 = true;
+  duneVersion = "3";
 
   propagatedBuildInputs = [ angstrom fmt bigstringaf ];
   checkInputs = [ alcotest ];