diff --git a/pkgs/development/ocaml-modules/callipyge/default.nix b/pkgs/development/ocaml-modules/callipyge/default.nix
index 2004f8868ca..68ba880a798 100644
--- a/pkgs/development/ocaml-modules/callipyge/default.nix
+++ b/pkgs/development/ocaml-modules/callipyge/default.nix
@@ -1,8 +1,6 @@
 { lib
 , buildDunePackage
 , fetchurl
-, ocaml
-
 , alcotest
 , eqaf
 , fmt
@@ -14,17 +12,16 @@ buildDunePackage rec {
 
   src = fetchurl {
     url = "https://github.com/oklm-wsh/Callipyge/releases/download/v${version}/${pname}-${version}.tbz";
-    sha256 = "sha256-T/94a88xvK51TggjXecdKc9kyTE9aIyueIt5T24sZB0=";
+    hash = "sha256-T/94a88xvK51TggjXecdKc9kyTE9aIyueIt5T24sZB0=";
   };
 
-  useDune2 = true;
+  duneVersion = "3";
 
-  minimumOCamlVersion = "4.03";
+  minimalOCamlVersion = "4.08";
 
   propagatedBuildInputs = [ fmt eqaf ];
 
-  # alcotest isn't available for OCaml < 4.08 due to fmt
-  doCheck = lib.versionAtLeast ocaml.version "4.08";
+  doCheck = true;
   checkInputs = [ alcotest ];
 
   meta = {