diff --git a/pkgs/development/ocaml-modules/shared-memory-ring/default.nix b/pkgs/development/ocaml-modules/shared-memory-ring/default.nix
index 17dd6183c0da..baeda2d1b152 100644
--- a/pkgs/development/ocaml-modules/shared-memory-ring/default.nix
+++ b/pkgs/development/ocaml-modules/shared-memory-ring/default.nix
@@ -10,13 +10,11 @@
 
 buildDunePackage rec {
   pname = "shared-memory-ring";
-  version = "3.1.0";
-
-  useDune2 = true;
+  version = "3.1.1";
 
   src = fetchurl {
-    url = "https://github.com/mirage/shared-memory-ring/releases/download/v${version}/shared-memory-ring-v${version}.tbz";
-    sha256 = "06350ph3rdfvybi0cgs3h3rdkmjspk3c4375rxvbdg0kza1w22x1";
+    url = "https://github.com/mirage/shared-memory-ring/releases/download/v${version}/shared-memory-ring-${version}.tbz";
+    sha256 = "sha256-KW8grij/OAnFkdUdRRZF21X39DvqayzkTWeRKwF8uoU=";
   };
 
   nativeBuildInputs = [
diff --git a/pkgs/development/ocaml-modules/shared-memory-ring/lwt.nix b/pkgs/development/ocaml-modules/shared-memory-ring/lwt.nix
index 8f41253bab8e..e3ae1ef2e3dc 100644
--- a/pkgs/development/ocaml-modules/shared-memory-ring/lwt.nix
+++ b/pkgs/development/ocaml-modules/shared-memory-ring/lwt.nix
@@ -12,7 +12,7 @@
 buildDunePackage {
   pname = "shared-memory-ring-lwt";
 
-  inherit (shared-memory-ring) version src useDune2;
+  inherit (shared-memory-ring) version src;
 
   buildInputs = [
     ppx_cstruct