--- libmypaint-1.4.0.ebuild	2019-10-25 20:09:34.000000000 +0200
+++ libmypaint-2.0.0_alpha2.ebuild	2019-11-24 21:43:50.240842062 +0100
@@ -1,22 +1,27 @@
 # Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=7
-PYTHON_COMPAT=( python2_7 )
+PYTHON_COMPAT=( python2_7 python3_6 )
 
 inherit autotools python-any-r1 xdg-utils toolchain-funcs
 
-MY_PV=${PV/_beta/-beta.}
-MY_P=${PN}-${MY_PV}
+if [[ ${PV} != ${PV/beta/} ]] || [[ ${PV} != ${PV/alpha/} ]]; then
+	MYPAINT_PV=$( ver_rs 3 - 4 .)
+else
+	MYPAINT_PV=${PV}
+fi
 
 DESCRIPTION="Library for making brushstrokes"
 HOMEPAGE="https://github.com/mypaint/libmypaint"
-SRC_URI="https://github.com/mypaint/libmypaint/releases/download/v${MY_PV}/${MY_P}.tar.xz"
+SRC_URI="https://github.com/mypaint/${PN}/archive/v${MYPAINT_PV}.tar.gz
+	->
+	${P}.tar.gz"
 
 LICENSE="ISC"
-SLOT="0/$(ver_cut 1-2)"  # https://github.com/mypaint/libmypaint/wiki/Versioning
+SLOT="2.0/$(ver_cut 1-2)"  # https://github.com/mypaint/libmypaint/wiki/Versioning
 KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~ia64 ~ppc ~ppc64 ~sparc ~x86"
 IUSE="gegl introspection nls openmp"
 
 CDEPEND="
 	dev-libs/glib:2
@@ -32,24 +37,26 @@
 DEPEND="${CDEPEND}
 	${PYTHON_DEPS}
 	nls? ( dev-util/intltool )
 	"
 RDEPEND="${CDEPEND}
-	!<media-gfx/mypaint-1.2.1
 	"
 
-S="${WORKDIR}"/${MY_P}
+S="${WORKDIR}"/${PN}-${MYPAINT_PV}
 
+# Patches snatched from Fedora Rawhide
 PATCHES=(
-	"${FILESDIR}"/${PN}-1.4.0-drop-libmypaint-gegl-versioning.patch
-	"${FILESDIR}"/${PN}-1.4.0-gegl-0.4.14.patch
+	"${FILESDIR}"/${PN}2-0002-build-with-and-require-gegl-0.4.patch
+	"${FILESDIR}"/${PN}2-0003-set-api-version-for-libmypaint-gegl.patch
 )
 
 src_prepare() {
 	xdg_environment_reset
 	default
 	eautoreconf
+	# Snatched from autogen.sh.
+	$EPYTHON generate.py mypaint-brush-settings-gen.h brushsettings-gen.h || die
 }
 
 src_configure() {
 	tc-ld-disable-gold  # bug 589266
 	econf \