diff --git a/pkgs/development/ocaml-modules/uunf/default.nix b/pkgs/development/ocaml-modules/uunf/default.nix
index d69c22db802..25246806171 100644
--- a/pkgs/development/ocaml-modules/uunf/default.nix
+++ b/pkgs/development/ocaml-modules/uunf/default.nix
@@ -1,8 +1,11 @@
-{ lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, uchar, uutf, cmdliner }:
+{ lib, stdenv, fetchurl, ocaml, findlib, ocamlbuild, topkg, uchar, uutf, cmdliner
+, cmdlinerSupport ? lib.versionAtLeast cmdliner.version "1.1"
+}:
+
 let
   pname = "uunf";
   webpage = "https://erratique.ch/software/${pname}";
-  version = "14.0.0";
+  version = "15.0.0";
 in
 
 if lib.versionOlder ocaml.version "4.03"
@@ -15,11 +18,12 @@ stdenv.mkDerivation {
 
   src = fetchurl {
     url = "${webpage}/releases/${pname}-${version}.tbz";
-    sha256 = "sha256:17wv0nm3vvwcbzb1b09akw8jblmigyhbfmh1sy9lkb5756ni94a2";
+    sha256 = "sha256-B/prPAwfqS8ZPS3fyDDIzXWRbKofwOCyCfwvh9veuug=";
   };
 
   nativeBuildInputs = [ ocaml findlib ocamlbuild topkg ];
-  buildInputs = [ topkg uutf cmdliner ];
+  buildInputs = [ topkg uutf ]
+  ++ lib.optional cmdlinerSupport cmdliner;
 
   propagatedBuildInputs = [ uchar ];
 
@@ -27,7 +31,15 @@ stdenv.mkDerivation {
 
   prePatch = lib.optionalString stdenv.isAarch64 "ulimit -s 16384";
 
-  inherit (topkg) buildPhase installPhase;
+  buildPhase = ''
+    runHook preBuild
+    ${topkg.run} build \
+      --with-uutf true \
+      --with-cmdliner ${lib.boolToString cmdlinerSupport}
+    runHook postBuild
+  '';
+
+  inherit (topkg) installPhase;
 
   meta = with lib; {
     description = "An OCaml module for normalizing Unicode text";