diff --git a/pkgs/development/ocaml-modules/uuseg/default.nix b/pkgs/development/ocaml-modules/uuseg/default.nix
index 6a97c5bbc33a..a277bffd85f3 100644
--- a/pkgs/development/ocaml-modules/uuseg/default.nix
+++ b/pkgs/development/ocaml-modules/uuseg/default.nix
@@ -1,4 +1,5 @@
 { lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, uucp, uutf, cmdliner
+, version ? if lib.versionAtLeast ocaml.version "4.14" then "15.1.0" else "15.0.0"
 , cmdlinerSupport ? lib.versionAtLeast cmdliner.version "1.1"
 }:
 
@@ -10,11 +11,14 @@ in
 stdenv.mkDerivation rec {
 
   name = "ocaml${ocaml.version}-${pname}-${version}";
-  version = "15.0.0";
+  inherit version;
 
   src = fetchurl {
     url = "${webpage}/releases/${pname}-${version}.tbz";
-    sha256 = "sha256-q8x3bia1QaKpzrWFxUmLWIraKqby7TuPNGvbSjkY4eM=";
+    hash = {
+      "15.1.0" = "sha256-IPI3Wd51HzX4n+uGcgc04us29jMjnKbGgVEAdp0CVMU=";
+      "15.0.0" = "sha256-q8x3bia1QaKpzrWFxUmLWIraKqby7TuPNGvbSjkY4eM=";
+    }."${version}";
   };
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild topkg ];