diff --git a/dev-ml/cow/Manifest b/dev-ml/cow/Manifest
new file mode 100644
index 0000000000..9b9138c8d1
--- /dev/null
+++ b/dev-ml/cow/Manifest
@@ -0,0 +1 @@
+DIST cow-v2.4.0.tbz 19641 BLAKE2B 257a74a20dee2ca54fa4ac825d5687197171b6c8643a4b5e46f1c8f078ffc85da5ed29caea003bffbd90fcef7718ce58bd90e64282e9482ee19b3f2b0ac524ba SHA512 a05745307e91a5690e22563f4c0b93ce5a232d1b4d362869ed50b26b5bc7c9de0ff3388f525a0ab5e8207b4b06673757ceba03114e0470bb3fd51c86994b6818
diff --git a/dev-ml/cow/cow-2.4.0.ebuild b/dev-ml/cow/cow-2.4.0.ebuild
new file mode 100644
index 0000000000..0dca8cc2f7
--- /dev/null
+++ b/dev-ml/cow/cow-2.4.0.ebuild
@@ -0,0 +1,29 @@
+# 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="Caml on the Web"
+HOMEPAGE="
+	http://www.openmirage.org/
+	https://github.com/mirage/ocaml-cow
+"
+SRC_URI="https://github.com/mirage/ocaml-cow/releases/download/v${PV}/${MY_P}.tbz"
+S="${WORKDIR}/${MY_P}"
+
+LICENSE="ISC"
+SLOT="0/${PV}"
+KEYWORDS="~amd64"
+IUSE="ocamlopt"
+
+DEPEND="
+	dev-ml/ezjsonm
+	dev-ml/omd
+	dev-ml/uri
+	dev-ml/xmlm
+"
+RDEPEND="${DEPEND}"
diff --git a/dev-ml/cow/metadata.xml b/dev-ml/cow/metadata.xml
new file mode 100644
index 0000000000..06464e3692
--- /dev/null
+++ b/dev-ml/cow/metadata.xml
@@ -0,0 +1,11 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+  <maintainer type="person">
+    <email>lssndrbarbieri@gmail.com</email>
+    <name>Alessandro Barbieri</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">mirage/ocaml-cow</remote-id>
+  </upstream>
+</pkgmetadata>