diff --git a/pkgs/development/ocaml-modules/safepass/default.nix b/pkgs/development/ocaml-modules/safepass/default.nix
index 363c8edf71ee..45d89da7f9bb 100644
--- a/pkgs/development/ocaml-modules/safepass/default.nix
+++ b/pkgs/development/ocaml-modules/safepass/default.nix
@@ -4,24 +4,22 @@
   buildDunePackage,
 }:
 
-buildDunePackage rec {
+buildDunePackage (finalAttrs: {
   pname = "safepass";
   version = "3.1";
 
-  useDune2 = true;
-
   src = fetchFromGitHub {
     owner = "darioteixeira";
     repo = "ocaml-safepass";
-    rev = "v${version}";
-    sha256 = "1cwslwdb1774lfmhcclj9kymvidbcpjx1vp16jnjirqdqgl4zs5q";
+    tag = "v${finalAttrs.version}";
+    hash = "sha256-uOhP6MMN5yitNOHu0OVlq8Vd/UySMgaro+ScsBqnmrM=";
   };
 
   meta = {
-    inherit (src.meta) homepage;
+    homepage = "https://github.com/darioteixeira/ocaml-safepass";
     description = "OCaml library offering facilities for the safe storage of user passwords";
     license = lib.licenses.lgpl21;
     maintainers = with lib.maintainers; [ vbgl ];
   };
 
-}
+})