diff --git a/pkgs/development/ocaml-modules/uuidm/default.nix b/pkgs/development/ocaml-modules/uuidm/default.nix
index 83b8cacc77a0..cf354c5e898d 100644
--- a/pkgs/development/ocaml-modules/uuidm/default.nix
+++ b/pkgs/development/ocaml-modules/uuidm/default.nix
@@ -1,20 +1,21 @@
-{ lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, cmdliner }:
+{ lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, cmdliner
+, version ? if lib.versionAtLeast ocaml.version "4.14" then "0.9.9" else "0.9.8"
+}:
 
 lib.throwIfNot (lib.versionAtLeast ocaml.version "4.08")
   "uuidm is not available for OCaml ${ocaml.version}"
 
-stdenv.mkDerivation rec {
-  version = "0.9.8";
+stdenv.mkDerivation {
+  inherit version;
   pname = "uuidm";
   src = fetchurl {
     url = "https://erratique.ch/software/uuidm/releases/uuidm-${version}.tbz";
-    sha256 = "sha256-/GZbkJVDQu1UY8SliK282kUWAVMfOnpQadUlRT/tJrM=";
+    hash = {
+      "0.9.9" = "sha256-jOgNF05dpoU/XQEefSZhn3zSlQ1BA1b/U4Ib9j2mvFo=";
+      "0.9.8" = "sha256-/GZbkJVDQu1UY8SliK282kUWAVMfOnpQadUlRT/tJrM=";
+    }."${version}";
   };
 
-  postPatch = ''
-    substituteInPlace pkg/META --replace "bytes" ""
-  '';
-
   strictDeps = true;
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild topkg ];