diff --git a/pkgs/development/ocaml-modules/merlin-extend/default.nix b/pkgs/development/ocaml-modules/merlin-extend/default.nix
index a8ccd2cf4a01..17013a11caad 100644
--- a/pkgs/development/ocaml-modules/merlin-extend/default.nix
+++ b/pkgs/development/ocaml-modules/merlin-extend/default.nix
@@ -2,13 +2,11 @@
 
 buildDunePackage rec {
   pname = "merlin-extend";
-  version = "0.6";
-
-  useDune2 = true;
+  version = "0.6.2";
 
   src = fetchurl {
-    url = "https://github.com/let-def/merlin-extend/releases/download/v${version}/merlin-extend-v${version}.tbz";
-    sha256 = "0hvc4mz92x3rl2dxwrhvhzwl4gilnyvvwcqgr45vmdpyjyp3dwn2";
+    url = "https://github.com/let-def/merlin-extend/releases/download/v${version}/merlin-extend-${version}.tbz";
+    hash = "sha256-R1WOfzC2RGLyucgvt/eHEzrPoNUTJFK2rXhI4LD013k=";
   };
 
   nativeBuildInputs = [ cppo ];