diff --git a/dev-ml/cstruct/Manifest b/dev-ml/cstruct/Manifest
new file mode 100644
index 0000000000..4c0dd85090
--- /dev/null
+++ b/dev-ml/cstruct/Manifest
@@ -0,0 +1 @@
+DIST ocaml-ctruct-6.0.0.tar.gz 242357 BLAKE2B e3f86f134cbae8724c392ba4e4a2c178cc49150758e995c24069a061e420ea2d53b26242d62397efb6e4cd5ba114f197fcab573bd831627bda833be16eaac668 SHA512 5dae3fe9f35d02ca0dedef1a01ad1ed2f7d52b167248b3badbcf3cf88d94104d4b6974b225d199a36a96c2282b5fbcc92baa00f98d3895d98472300ad0f50b1e
diff --git a/dev-ml/cstruct/cstruct-6.0.0-r2.ebuild b/dev-ml/cstruct/cstruct-6.0.0-r2.ebuild
new file mode 100644
index 0000000000..b6db64c461
--- /dev/null
+++ b/dev-ml/cstruct/cstruct-6.0.0-r2.ebuild
@@ -0,0 +1,37 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+inherit dune
+
+DESCRIPTION="Map OCaml arrays onto C-like structs"
+HOMEPAGE="https://github.com/mirage/ocaml-cstruct"
+SRC_URI="https://github.com/mirage/ocaml-cstruct/archive/v${PV}.tar.gz -> ocaml-ctruct-${PV}.tar.gz"
+S="${WORKDIR}/ocaml-cstruct-${PV}"
+
+LICENSE="ISC"
+SLOT="0/${PV}"
+KEYWORDS="~amd64"
+IUSE="ocamlopt"
+
+RDEPEND="
+	>=dev-lang/ocaml-4.08.0
+	>=dev-ml/fmt-0.8.9
+	dev-ml/async
+	dev-ml/async_unix
+	dev-ml/core
+	dev-ml/lwt
+	dev-ml/sexplib
+	dev-ml/ppxlib
+"
+DEPEND="${RDEPEND}"
+
+src_install() {
+	dune_src_install cstruct-async
+	dune_src_install cstruct-lwt
+	dune_src_install cstruct-sexp
+	dune_src_install cstruct-unix
+	dune_src_install cstruct
+	dune_src_install ppx_cstruct
+}
diff --git a/dev-ml/cstruct/metadata.xml b/dev-ml/cstruct/metadata.xml
new file mode 100644
index 0000000000..e689615f67
--- /dev/null
+++ b/dev-ml/cstruct/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-cstruct</remote-id>
+  </upstream>
+</pkgmetadata>