diff --git a/sdk_container/src/third_party/portage-stable/dev-python/cython/Manifest b/sdk_container/src/third_party/portage-stable/dev-python/cython/Manifest
index a572f678c4..ba11525c42 100644
--- a/sdk_container/src/third_party/portage-stable/dev-python/cython/Manifest
+++ b/sdk_container/src/third_party/portage-stable/dev-python/cython/Manifest
@@ -1,2 +1,4 @@
 DIST cython-3.0.11.gh.tar.gz 2775463 BLAKE2B f5f53c328a1b48b04548f1ee7be3988451d2a8e339b785285e2d973e63b37dabc6021f32ba1691ae8dbe9ee7706a5feda399b071b4893a3be4fe4afcd608f46b SHA512 8f7982af5be1db1072b1090257a9d487dc341d79522f442f4608303d18b388349a7d586ec74e66fbffd0ce88c00ca622202729907fe7cefef71828cfd3f68fe6
 DIST cython-3.0.12.gh.tar.gz 2777066 BLAKE2B 3e2730b7b0ef90ba6a7d4a510dbaa24b7c966d68c397196727b6d63b435c6775aa818a7d1b741819a7940ad44cadbc83be4aa48117b2dcf7bd844f4c9bc268bc SHA512 bbf2cc662b846cf5ff9b686046ec210ea9d3893482e2b5a2696d2ad44f12facd15075b168a3eb6d1f4ea799786f676868eab2593451bceb2937aec2cb1aea99e
+DIST cython-3.0.12.tar.gz 2757617 BLAKE2B 064549e36e03424065eab081b60e2761d198490cfd4d7836ea236b833ada3962e6ed42ba1710b33418f8a31ac282cdc156ceb544ee21be80ee34b7a3d3f6c7fb SHA512 c4e85596eeea444fae983d32ce8731cc5d0d612d1f96b998db3aa7946e8be151a7ea62c6df163d875111e306c870656b82a8468dd873cacf84c7bd5671a39bc3
+DIST cython-3.1.0b1.tar.gz 3192916 BLAKE2B 13a8fa48319d9c4c8cc634d3cf5af599b867466d5de4cf3a24dd342b7812a392e854d9a6152309c6ef84a2925ebfa2257792d0f4e0c8fa36580d7138a663105a SHA512 ced9d57536d3bacd274b5edc4137d400a6182b4b7a89a28cf358f843dcbb0e0e7171fb0842441a81e1d2ac12acb6fd6a3df7018fe2a8708cb188a96cb184d799
diff --git a/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.0.12-r1.ebuild b/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.0.12-r1.ebuild
new file mode 100644
index 0000000000..8f2aa670ba
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.0.12-r1.ebuild
@@ -0,0 +1,78 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_EXT=1
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_TESTED=( python3_{10..12} )
+PYTHON_COMPAT=( "${PYTHON_TESTED[@]}" pypy3 pypy3_11 python3_13 )
+PYTHON_REQ_USE="threads(+)"
+
+inherit distutils-r1 multiprocessing pypi toolchain-funcs
+
+DESCRIPTION="A Python to C compiler"
+HOMEPAGE="
+	https://cython.org/
+	https://github.com/cython/cython/
+	https://pypi.org/project/Cython/
+"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	${RDEPEND}
+	test? (
+		$(python_gen_cond_dep '
+			<dev-python/numpy-2[${PYTHON_USEDEP}]
+		' "${PYTHON_TESTED[@]}")
+	)
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-0.29.22-spawn-multiprocessing.patch"
+	"${FILESDIR}/${PN}-0.29.23-test_exceptions-py310.patch"
+	"${FILESDIR}/${PN}-0.29.23-pythran-parallel-install.patch"
+)
+
+distutils_enable_sphinx docs \
+	dev-python/jinja2 \
+	dev-python/sphinx-issues \
+	dev-python/sphinx-tabs
+
+python_compile() {
+	# Python gets confused when it is in sys.path before build.
+	local -x PYTHONPATH=
+
+	distutils-r1_python_compile
+}
+
+python_test() {
+	if ! has "${EPYTHON/./_}" "${PYTHON_TESTED[@]}"; then
+		einfo "Skipping tests on ${EPYTHON} (xfail)"
+		return
+	fi
+
+	# Needed to avoid confusing cache tests
+	unset CYTHON_FORCE_REGEN
+
+	tc-export CC
+	# https://github.com/cython/cython/issues/1911
+	local -x CFLAGS="${CFLAGS} -fno-strict-overflow"
+	"${PYTHON}" runtests.py \
+		-vv \
+		-j "$(makeopts_jobs)" \
+		--work-dir "${BUILD_DIR}"/tests \
+		--no-examples \
+		--no-code-style \
+		|| die "Tests fail with ${EPYTHON}"
+}
+
+python_install_all() {
+	local DOCS=( CHANGES.rst README.rst ToDo.txt USAGE.txt )
+	distutils-r1_python_install_all
+}
diff --git a/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.1.0_beta1.ebuild b/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.1.0_beta1.ebuild
new file mode 100644
index 0000000000..69a8f0805b
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-python/cython/cython-3.1.0_beta1.ebuild
@@ -0,0 +1,76 @@
+# Copyright 1999-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_EXT=1
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_TESTED=( python3_{10..12} )
+PYTHON_COMPAT=( "${PYTHON_TESTED[@]}" pypy3 pypy3_11 python3_13 )
+PYTHON_REQ_USE="threads(+)"
+
+inherit distutils-r1 multiprocessing pypi toolchain-funcs
+
+DESCRIPTION="A Python to C compiler"
+HOMEPAGE="
+	https://cython.org/
+	https://github.com/cython/cython/
+	https://pypi.org/project/Cython/
+"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="test"
+RESTRICT="!test? ( test )"
+
+BDEPEND="
+	${RDEPEND}
+	test? (
+		$(python_gen_cond_dep '
+			<dev-python/numpy-2[${PYTHON_USEDEP}]
+		' "${PYTHON_TESTED[@]}")
+	)
+"
+
+PATCHES=(
+	"${FILESDIR}/${PN}-0.29.22-spawn-multiprocessing.patch"
+	"${FILESDIR}/${PN}-0.29.23-pythran-parallel-install.patch"
+)
+
+distutils_enable_sphinx docs \
+	dev-python/jinja2 \
+	dev-python/sphinx-issues \
+	dev-python/sphinx-tabs
+
+python_compile() {
+	# Python gets confused when it is in sys.path before build.
+	local -x PYTHONPATH=
+
+	distutils-r1_python_compile
+}
+
+python_test() {
+	if ! has "${EPYTHON/./_}" "${PYTHON_TESTED[@]}"; then
+		einfo "Skipping tests on ${EPYTHON} (xfail)"
+		return
+	fi
+
+	# Needed to avoid confusing cache tests
+	unset CYTHON_FORCE_REGEN
+
+	tc-export CC
+	# https://github.com/cython/cython/issues/1911
+	local -x CFLAGS="${CFLAGS} -fno-strict-overflow"
+	"${PYTHON}" runtests.py \
+		-vv \
+		-j "$(makeopts_jobs)" \
+		--work-dir "${BUILD_DIR}"/tests \
+		--no-examples \
+		--no-code-style \
+		|| die "Tests fail with ${EPYTHON}"
+}
+
+python_install_all() {
+	local DOCS=( CHANGES.rst README.rst ToDo.txt USAGE.txt )
+	distutils-r1_python_install_all
+}