diff --git a/net-im/riot-web/riot-web-9999.ebuild b/net-im/riot-web/riot-web-9999.ebuild
new file mode 100644
index 000000000..8a6995095
--- /dev/null
+++ b/net-im/riot-web/riot-web-9999.ebuild
@@ -0,0 +1,76 @@
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=6
+
+DESCRIPTION="A glossy Matrix collaboration client for the web"
+HOMEPAGE="https://riot.im"
+
+inherit eutils
+
+if [[ ${PV} == "9999" ]]; then
+	inherit git-r3
+
+	SRC_URI=""
+	EGIT_REPO_URI="https://github.com/vector-im/riot-web.git"
+	EGIT_BRANCH="develop"
+else
+	SRC_URI="https://github.com/vector-im/riot-web/archive/v${PV}.tar.gz -> ${P}.tar.gz"
+	KEYWORDS="~amd64 ~x86"
+fi
+
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="abi_x86_32 abi_x86_64"
+REQUIRED_USE="abi_x86_32? ( !abi_x86_64 )
+	abi_x86_64? ( !abi_x86_32 )"
+
+DEPEND="sys-devel/binutils:*
+	net-libs/nodejs[npm]
+	x11-libs/libXScrnSaver
+	net-print/cups
+	dev-libs/nss
+	gnome-base/gconf"
+RDEPEND="${DEPEND}"
+
+QA_PREBUILT="
+	opt/Riot/libffmpeg.so
+	opt/Riot/libnode.so
+	opt/Riot/riot-web"
+
+DESTINATION="/" # We build and unpack a Debian installer, which already has everything in the proper directories {usr,opt}, so we just set the destination to "/"
+
+src_prepare() {
+	default
+
+	if [[ ${PV} == "9999" ]]; then
+		"${S}"/scripts/fetch-develop.deps.sh
+	fi
+
+	npm install
+
+	cp "${S}"/config.sample.json "${S}"/config.json
+}
+
+src_compile() {
+	npm run build || die
+
+	if use abi_x86_32; then
+		"${S}"/node_modules/.bin/build -l --ia32 || die
+	elif use abi_x86_64; then
+		"${S}"/node_modules/.bin/build -l --x64 || die
+	fi
+}
+
+src_install() {
+	ar x "${S}"/electron_app/dist/riot-web*.deb
+	tar xvf data.tar.xz
+
+	mv usr/share/doc/${PN} usr/share/doc/${PF}
+	gunzip usr/share/doc/${PF}/changelog.gz
+	insinto ${DESTINATION}
+	doins -r usr
+	doins -r opt
+	fperms +x /opt/Riot/${PN}
+	dosym ${DESTINATION}/opt/Riot/${PN} ${DESTINATION}/usr/bin/${PN}
+}