diff --git a/dev-ml/js_of_ocaml/Manifest b/dev-ml/js_of_ocaml/Manifest
new file mode 100644
index 0000000000..b6e09e3705
--- /dev/null
+++ b/dev-ml/js_of_ocaml/Manifest
@@ -0,0 +1 @@
+DIST js_of_ocaml-4.0.0.tar.gz 1477388 BLAKE2B 607496adfa192f92961adc2eeccf9dcd65d3c49eab8d60644197b4713608b320496fc9818d3b744de2ceb37c23af61662358824e6e1779281b5b140308960c50 SHA512 e46492a728fa315984257aebebe7c6a63dba48197674443a3c904f8e3a8aca67f68e43ec361e695ee93457c5d7cde81026c4ec1988bf7fc250ff1daddbd8e574
diff --git a/dev-ml/js_of_ocaml/js_of_ocaml-4.0.0.ebuild b/dev-ml/js_of_ocaml/js_of_ocaml-4.0.0.ebuild
new file mode 100644
index 0000000000..4057ce3fc9
--- /dev/null
+++ b/dev-ml/js_of_ocaml/js_of_ocaml-4.0.0.ebuild
@@ -0,0 +1,37 @@
+# Copyright 1999-2022 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+inherit dune findlib
+
+DESCRIPTION="A compiler from OCaml bytecode to javascript"
+HOMEPAGE="
+	http://ocsigen.org/js_of_ocaml/
+	https://github.com/ocsigen/js_of_ocaml
+"
+SRC_URI="https://github.com/ocsigen/js_of_ocaml/archive/${PV}.tar.gz -> ${P}.tar.gz"
+
+KEYWORDS="~amd64"
+LICENSE="LGPL-2.1-with-linking-exception"
+SLOT="0/${PV}"
+IUSE="ocamlopt"
+
+RDEPEND="
+	dev-ml/cmdliner
+	dev-ml/lwt
+	dev-ml/menhir
+	dev-ml/ppxlib
+	dev-ml/ppx_expect
+	dev-ml/react
+	dev-ml/reactiveData
+	dev-ml/tyxml
+	dev-ml/yojson
+"
+DEPEND="${RDEPEND}"
+
+src_install() {
+	for p in js_of_ocaml{,-compiler,-lwt,-ppx,-ppx_deriving_json,-toplevel,-tyxml} ; do
+		dune_src_install ${p}
+	done
+}
diff --git a/dev-ml/js_of_ocaml/metadata.xml b/dev-ml/js_of_ocaml/metadata.xml
new file mode 100644
index 0000000000..b0fbe5f301
--- /dev/null
+++ b/dev-ml/js_of_ocaml/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-maintainers welcome</description>
+    <email>lssndrbarbieri@gmail.com</email>
+    <name>Alessandro Barbieri</name>
+  </maintainer>
+  <upstream>
+    <remote-id type="github">ocsigen/js_of_ocaml</remote-id>
+  </upstream>
+</pkgmetadata>