diff --git a/pkgs/development/ocaml-modules/uuuu/default.nix b/pkgs/development/ocaml-modules/uuuu/default.nix
new file mode 100644
index 000000000000..3f516f10ca0b
--- /dev/null
+++ b/pkgs/development/ocaml-modules/uuuu/default.nix
@@ -0,0 +1,40 @@
+{ angstrom
+, buildDunePackage
+, fetchzip
+, findlib
+, lib
+, menhir
+, ocaml
+, re
+}:
+
+buildDunePackage rec {
+  pname = "uuuu";
+  version = "0.2.0";
+
+  src = fetchzip {
+    url = "https://github.com/mirage/uuuu/releases/download/v${version}/uuuu-v${version}.tbz";
+    sha256 = "0457qcxvakbbc56frsh8a5v4y4l0raj9p4zz7jx3brn9255j1mw3";
+  };
+
+  postPatch = ''
+    substituteInPlace src/dune --replace 'ocaml} ' \
+      'ocaml} -I ${findlib}/lib/ocaml/${ocaml.version}/site-lib '
+  '';
+
+  useDune2 = true;
+
+  nativeBuildInputs = [ menhir ];
+
+  buildInputs = [ angstrom ];
+
+  checkInputs = [ re ];
+  doCheck = true;
+
+  meta = {
+    description = "A library to normalize an ISO-8859 input to Unicode code-point";
+    license = lib.licenses.mit;
+    homepage = "https://github.com/mirage/uuuu";
+    maintainers = with lib.maintainers; [ superherointj ];
+  };
+}
diff --git a/pkgs/top-level/ocaml-packages.nix b/pkgs/top-level/ocaml-packages.nix
index 5d2746c44f43..c9c16d00beda 100644
--- a/pkgs/top-level/ocaml-packages.nix
+++ b/pkgs/top-level/ocaml-packages.nix
@@ -1368,6 +1368,8 @@ let
     uuseg = callPackage ../development/ocaml-modules/uuseg { };
     uutf = callPackage ../development/ocaml-modules/uutf { };
 
+    uuuu = callPackage ../development/ocaml-modules/uuuu { };
+
     variantslib_p4 = callPackage ../development/ocaml-modules/variantslib { };
 
     vchan = callPackage ../development/ocaml-modules/vchan { };