diff --git a/pkgs/development/ocaml-modules/syslog-message/default.nix b/pkgs/development/ocaml-modules/syslog-message/default.nix
index 2c12415cdbb2..73cbba8be391 100644
--- a/pkgs/development/ocaml-modules/syslog-message/default.nix
+++ b/pkgs/development/ocaml-modules/syslog-message/default.nix
@@ -1,5 +1,4 @@
 { lib, buildDunePackage, fetchurl
-, ocaml
 , astring, ptime, rresult, qcheck
 }:
 
@@ -7,13 +6,12 @@ buildDunePackage rec {
   pname = "syslog-message";
   version = "1.1.0";
 
-  minimumOCamlVersion = "4.03";
-
-  useDune2 = true;
+  minimalOCamlVersion = "4.08";
+  duneVersion = "3";
 
   src = fetchurl {
     url = "https://github.com/verbosemode/${pname}/releases/download/${version}/${pname}-${version}.tbz";
-    sha256 = "0vy4dkl2q2fa6rzyfsvjyc9r1b9ymfqd6j35z2kp5vdc4r87053g";
+    hash = "sha256:0vy4dkl2q2fa6rzyfsvjyc9r1b9ymfqd6j35z2kp5vdc4r87053g";
   };
 
   propagatedBuildInputs = [
@@ -22,7 +20,7 @@ buildDunePackage rec {
     rresult
   ];
 
-  doCheck = lib.versionAtLeast ocaml.version "4.08";
+  doCheck = true;
   checkInputs = [
     qcheck
   ];