diff --git a/dev-ml/hex/Manifest b/dev-ml/hex/Manifest
new file mode 100644
index 0000000000..1404909a9d
--- /dev/null
+++ b/dev-ml/hex/Manifest
@@ -0,0 +1 @@
+DIST hex-v1.4.0.tbz 6546 BLAKE2B 9c8302af46b464e25b3c50e747e8493a80ef39eb7be8f9d94a5b3f761b90191ede63a942dec8b510fe0e954377e3018f7229f43280ed7f1a66c52b074dae646c SHA512 51fe702a5ffdb53380c4528c28f84d814a3c2c4cdfc1cc097348816fc66f27a0c871a2600549a2b6c7f1dff760386f7687de3a111343e526eb9bd86f92ef1814
diff --git a/dev-ml/hex/hex-1.4.0-r1.ebuild b/dev-ml/hex/hex-1.4.0-r1.ebuild
new file mode 100644
index 0000000000..57520a4327
--- /dev/null
+++ b/dev-ml/hex/hex-1.4.0-r1.ebuild
@@ -0,0 +1,24 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dune
+
+MY_P="${PN}-v${PV}"
+
+DESCRIPTION="Hexadecimal converter"
+HOMEPAGE="https://github.com/mirage/ocaml-hex"
+SRC_URI="https://github.com/mirage/ocaml-hex/releases/download/v${PV}/${MY_P}.tbz"
+S="${WORKDIR}/${MY_P}"
+
+LICENSE="ISC"
+SLOT="0/${PV}"
+KEYWORDS="~amd64"
+IUSE="ocamlopt"
+
+DEPEND="
+	>=dev-ml/bigarray-compat-1.0.0
+	>=dev-ml/cstruct-1.7.0
+"
+RDEPEND="${DEPEND}"
diff --git a/dev-ml/hex/metadata.xml b/dev-ml/hex/metadata.xml
new file mode 100644
index 0000000000..83a6dee0de
--- /dev/null
+++ b/dev-ml/hex/metadata.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person">
+    <description>co-mainteiners welcome</description>
+    <email>lssndrbarbieri@gmail.com</email>
+    <name>Alessandro Barbieri</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">mirage/ocaml-hex</remote-id>
+  </upstream>
+</pkgmetadata>