diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/Manifest b/sdk_container/src/third_party/portage-stable/dev-build/meson/Manifest
index 4be4857a8d..2ae304af07 100644
--- a/sdk_container/src/third_party/portage-stable/dev-build/meson/Manifest
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/Manifest
@@ -18,6 +18,10 @@ DIST meson-1.8.1.tar.gz 2332007 BLAKE2B 8fa77bd0e1494d94de585f8f740cb01dfc302fef
 DIST meson-1.8.1.tar.gz.asc 833 BLAKE2B a31c10eb386597049eed127987dfa32f044fbd2ec0261fa0547c066a47a57e27893821f80eb6a7ad82fd72278ff77abdaf4a88fd057b9b960edd8626530a17be SHA512 5d6a0681ccd1132f86904b88fdef4838a9de403d29b6dddb8d8626ce3f1e9d1d911b79f821aa81cd1421fd4c095ca488494a1b77e59f94ba616504eef251dbc7
 DIST meson-1.8.2.tar.gz 2335538 BLAKE2B c3a4e2c505af02b85407f66bb076d4c1a96ca0fde85576d26d8ad6522dce8107f1bdb97c771b0f28e527da0383853b36cd56e8533d5be175cf62b7fbadca40b6 SHA512 d3d87c806a0ac8405af9205cc2c9a5f2dbeda8639506bf96bfb3821aa8184c185a1afc29738a54b47902ef830c1b5253e3ee3542a3f9bbc8fd91b9ea02f0a0b7
 DIST meson-1.8.2.tar.gz.asc 833 BLAKE2B c59ef68cf74daf9658c6589cc037a21bbc9fa03134093b1a30425ba19a69036868c1c7bd1c7f26b486a6eb9e6e13796f02b52e7caa78701d546d9da3f7591b41 SHA512 9f6dbe0329a8f1685110fadd803239eb675b67f59f2f1988494ec6e95110aca754ff7dbb6edad708c53b9420bd09c2d115af5f9f879175a9e37cb28f978add8b
+DIST meson-1.8.3.tar.gz 2335924 BLAKE2B 3c440854bd91c757d4370b498f0e6e903df4589f4958e05fa16ae70e6efc01d2e96f101612146556b81cc3db370255f4319bd5d49d8e46210df282cc447ec12e SHA512 effd6f556152e508185a5bc59131b3a31696577298aec5f3d3ab68153ade9e98242171d6b72c00f8c32fc3492aba3487252d77a94a96b5a92e89724de045d49b
+DIST meson-1.8.3.tar.gz.asc 833 BLAKE2B 25f00f76819c74e64b3750ddd4507fdd8a0be764db54ea48ba49f0985bfbf04d294e5eff1ee799ec082cba24ed59b21a8fd75f81dee9d824e5f8cd9c775b0dcd SHA512 9c28747ff4756422dae4eb4a86de24fe230e6676660aa9cfb72d29311012106a9edbcfff3559682917a7e0ed8c80af8b8ec37807d3f7e0f4005eed5793367307
+DIST meson-1.9.0rc1.tar.gz 2366185 BLAKE2B 83405d3daa8caf95a2991249abdb2f3f32b2508c93cfcdc36451290989778d98173dea932520e27005d28bac19ca28024be8914122bd516b8efd2c56b52b85d5 SHA512 7f892004aae8f2618d03424829fa053560ec3ecf04a32c691769356ac671358616c512fa0efd1f37f3e33702bf2b907150059faf6e305ecf6f786463194cacab
+DIST meson-1.9.0rc1.tar.gz.asc 833 BLAKE2B 55ec82df85b58697116f4dc0014f2b49bfcd49facf92db28d8a73ee4a3928d38cabfe32fdef773ad7e0f453cc1e271b9b7b599b1e2156f6835e2bc85f2685417 SHA512 de12d08222a1d3bba245b1aba06ef49c711214271883a7c92d0cc7936e005a361a347b5fe5592c1e7bd9aac4a752edd854831290dbb8cbf8464658271de6d9b2
 DIST meson-reference-1.4.2.3 339324 BLAKE2B 1a4fbd8c27a8cfba773777eabd2ebaa0f76ec0c61dcfe1c7b4483737b348ff9528d68f26e68d7d40b2e1875611eed5b9a31c1cf55fed8eabb42fc1e31d9ef14b SHA512 8b8ec43e812599203ec44c08805eb6818485805c45b9c69802261eaa35efc97846a96f6472c6b1ef5f6c703e7153fd957df7b805f173ca3400a2030dfbe002ca
 DIST meson-reference-1.5.2.3 341110 BLAKE2B 0d588b796f7f2da2dcb0e7822acde6a9a461930da4bfead3cf9148fa0fac18cd0ccbc6e891f555c973836f1c16b4eae299908a838a0b6843293de8815d30fc23 SHA512 64715ce2113e362e7d67179fe13566bc8f84ce7f4e6d795b836f42455a871173fee06e3e969e2996022d7e6c9b4b5379587a4c0c3d97b4bca527fb8902d3547f
 DIST meson-reference-1.6.1.3 343730 BLAKE2B 55df822192781a70e4bc44cfe14fb363e3f820406260ca9705d7fdb5fad1bf0117e3f1325d37e58e23477bc075ab6bd84056409355ec694f72eeaa5bf982ecc7 SHA512 553cdcd86a7a600cda05ac970cc285c4c50017d1e7d2925645d7f19a62b34c2f079673cafecf4111aa102afbe9d8e4d56f166d1d9940b740eeec0bb99d6cbc0d
@@ -25,3 +29,5 @@ DIST meson-reference-1.7.0.3 344764 BLAKE2B 615c70325b6ca3b964bf2827f20f07845150
 DIST meson-reference-1.7.2.3 344764 BLAKE2B 82de9a7a01c2f1b45a2b3432deb4713af3cfd3b2dc9af8802488b7d1b86dde9b6ac81f90b144006a79e90b313e1d4d23f9cc90e17255ce9573e5487d3e20c286 SHA512 d482a3b3bed671705d6316e106984ad2c2169fe890349437e512455705ee8dddb31a29d31f44402a4c7c5bd2f78595b75bfc5ad34d8c0337b66f40837b08ee56
 DIST meson-reference-1.8.1.3 345633 BLAKE2B 026423161eeddff3e663016c4b3fff885e96dc1a652562fe312cb80cfcc845015cab0d0f51c39f187cc484752f8f2bf7954dc8daf6762a74f895338cac4c35c4 SHA512 d3041eee86e63c178a04d5ec1ec383e7bbd209f358103806d488b28383471c1ecb5a13aa3716f699c1973a1d32dace34b0fdb0375e19abc0050deeb66fc5d376
 DIST meson-reference-1.8.2.3 345633 BLAKE2B a53888284967c1beb8875a380eb7fd58402db0ae8d3357f47cd265a1695f73f85dd5ef6c36ee95252012120f3b904d74dabcbd4b1aa4174975b1d1899d30283c SHA512 b40904bebedc678f4e8567cd0b6a377a678d4f3fa13feb5d978d65b39a308b607c78adfc6b742f9d7c2f2c57e7b011f52d875e97b85f1c4ffbfd4ebe52814443
+DIST meson-reference-1.8.3.3 345855 BLAKE2B c8825ba7b72b36866ebfa8cdf63362f2d38673315378ea213c438057f5dafa36b9e729e8c415a29715c1da4fe72733a4a6a2cdbee4b7df57e5eb97f50152491b SHA512 3085c10cfc08ce4f0edad7129ce4d9a0bf75c6522309e344ba14e27c34d46c3da25ebb46260de28caef4a6c8134857d63297ded26f1296639a8a097e62a1801c
+DIST meson-reference-1.9.0rc1.3 347290 BLAKE2B 3aed4aa402e25d3c16c38a7637d318f67dd0c37a7edad6ceaa9f867132bf2709be0b874a57a8ecad30e2a30f8daba6e0802198a4b0747372850493429b2d12d1 SHA512 9c493127efdb3420f863f9b1b357661c661dfdb1510638e9264c14c6291e9c7cf8cbed2b5611fe19afc076326f4031a7bc6fe7f023b547c123c81455b2026189
diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.0.ebuild b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.0.ebuild
index 74fc5cee9d..fa4fbb404a 100644
--- a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.0.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.0.ebuild
@@ -84,6 +84,7 @@ DEPEND="
 		dev-qt/linguist-tools:5
 		dev-qt/qtwidgets:5
 		dev-qt/qtbase:6[gui,widgets]
+		dev-qt/qtdeclarative:6
 		dev-qt/qttools:6
 		dev-util/gdbus-codegen
 		x11-libs/gtk+:3
diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.2.ebuild b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.2.ebuild
index f944f07ba0..28f3281253 100644
--- a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.2.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.7.2.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-PYTHON_COMPAT=( python3_{10..13} pypy3 pypy3_11 )
+PYTHON_COMPAT=( python3_{11..14} pypy3_11 )
 DISTUTILS_USE_PEP517=setuptools
 
 inherit shell-completion edo distutils-r1 flag-o-matic toolchain-funcs
@@ -87,6 +87,7 @@ DEPEND="
 		dev-qt/linguist-tools:5
 		dev-qt/qtwidgets:5
 		dev-qt/qtbase:6[gui,widgets]
+		dev-qt/qtdeclarative:6
 		dev-qt/qttools:6
 		dev-util/gdbus-codegen
 		x11-libs/gtk+:3
diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.8.3.ebuild b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.8.3.ebuild
new file mode 100644
index 0000000000..699967ac5f
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.8.3.ebuild
@@ -0,0 +1,231 @@
+# Copyright 2016-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} pypy3_11 )
+DISTUTILS_USE_PEP517=setuptools
+
+inherit shell-completion edo distutils-r1 flag-o-matic toolchain-funcs
+
+if [[ ${PV} = *9999* ]]; then
+	EGIT_REPO_URI="https://github.com/mesonbuild/meson"
+	inherit ninja-utils git-r3
+
+	BDEPEND="
+		${NINJA_DEPEND}
+		$(python_gen_any_dep 'dev-python/pyyaml[${PYTHON_USEDEP}]')
+	"
+
+else
+	inherit verify-sig
+
+	MY_PV=${PV/_/}
+	MY_P=${P/_/}
+	S=${WORKDIR}/${MY_P}
+
+	SRC_URI="
+		https://github.com/mesonbuild/meson/releases/download/${MY_PV}/${MY_P}.tar.gz
+		verify-sig? ( https://github.com/mesonbuild/meson/releases/download/${MY_PV}/${MY_P}.tar.gz.asc )
+		https://github.com/mesonbuild/meson/releases/download/${MY_PV}/meson-reference.3 -> meson-reference-${MY_PV}.3
+	"
+	# Releases may be signed by those listed in Releasing.md. Jussi
+	# remains the default release manager.
+	# https://github.com/mesonbuild/meson/commit/c2d795735fa1c46c54d6aed4d4a30f36a1f853cb
+	BDEPEND="verify-sig? ( sec-keys/openpgp-keys-jpakkane )"
+	VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/jpakkane.gpg
+
+	if [[ ${PV} != *_rc* ]] ; then
+		KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+	fi
+fi
+
+DESCRIPTION="Open source build system"
+HOMEPAGE="https://mesonbuild.com/"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="test test-full"
+RESTRICT="!test? ( test )"
+REQUIRED_USE="test-full? ( test )"
+
+DEPEND="
+	test? (
+		dev-libs/glib:2
+		dev-libs/gobject-introspection
+		app-alternatives/ninja
+		dev-vcs/git
+		sys-libs/zlib[static-libs(+)]
+		virtual/pkgconfig
+		dev-build/cmake
+	)
+	test-full? (
+		|| ( dev-lang/rust dev-lang/rust-bin )
+		dev-lang/nasm
+		>=dev-lang/pypy-3
+		dev-lang/vala
+		dev-python/cython
+		virtual/fortran
+		virtual/jdk
+
+		app-text/doxygen
+		dev-cpp/gtest
+		dev-libs/protobuf
+		dev-util/bindgen
+		dev-util/gtk-doc
+		dev-util/itstool
+		llvm-core/llvm
+		media-libs/libsdl2
+		media-libs/libwmf
+		net-libs/libpcap
+		sci-libs/hdf5[fortran]
+		sci-libs/netcdf
+		sys-cluster/openmpi[fortran]
+		sys-devel/bison
+		sys-devel/flex
+
+		dev-qt/linguist-tools:5
+		dev-qt/qtwidgets:5
+		dev-qt/qtbase:6[gui,widgets]
+		dev-qt/qtdeclarative:6
+		dev-qt/qttools:6
+		dev-util/gdbus-codegen
+		x11-libs/gtk+:3
+
+		dev-libs/wayland
+		dev-util/wayland-scanner
+	)
+"
+RDEPEND="
+	!<dev-build/muon-0.2.0-r2[man(-)]
+	virtual/pkgconfig
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.2.1-python-path.patch
+)
+
+src_unpack() {
+	if [[ ${PV} = *9999* ]]; then
+		git-r3_src_unpack
+	else
+		default
+		use verify-sig && verify-sig_verify_detached "${DISTDIR}"/${MY_P}.tar.gz{,.asc}
+	fi
+}
+
+python_prepare_all() {
+	local disable_unittests=(
+		# ASAN and sandbox both want control over LD_PRELOAD
+		# https://bugs.gentoo.org/673016
+		-e 's/test_generate_gir_with_address_sanitizer/_&/'
+		-e 's/test_env_cflags_ldflags/_&/'
+		-e 's/test_c_link_args_and_env/_&/'
+
+		# ASAN is unsupported on some targets
+		# https://bugs.gentoo.org/692822
+		-e 's/test_pch_with_address_sanitizer/_&/'
+
+		# clippy-driver fails, but only when run via portage.
+		#
+		#   error[E0463]: can't find crate for `std`
+		#   error: requires `sized` lang_item
+		-e 's/test_rust_clippy/_&/'
+	)
+
+	sed -i "${disable_unittests[@]}" unittests/*.py || die
+
+	# Broken due to python2 script created by python_wrapper_setup
+	rm -r "test cases/frameworks/1 boost" || die
+	# nvcc breaks on essentially any LDFLAGS
+	# https://bugs.gentoo.org/936757
+	# https://github.com/mesonbuild/meson/issues/11234
+	rm -r "test cases/cuda"/* || die
+
+	distutils-r1_python_prepare_all
+}
+
+python_check_deps() {
+	if [[ ${PV} = *9999* ]]; then
+		python_has_version "dev-python/pyyaml[${PYTHON_USEDEP}]"
+	fi
+}
+
+python_configure_all() {
+	if [[ ${PV} = *9999* ]]; then
+		# We use the unsafe_yaml loader because strictyaml is not packaged. In
+		# theory they produce the same results, but pyyaml is faster and
+		# without safety checks.
+		edo ./meson.py setup \
+			--prefix "${EPREFIX}/usr" \
+			-Dhtml=false \
+			-Dunsafe_yaml=true \
+			docs/ docs/builddir
+	fi
+}
+
+python_compile_all() {
+	if [[ ${PV} = *9999* ]]; then
+		eninja -C docs/builddir
+	fi
+}
+
+src_test() {
+	tc-export PKG_CONFIG
+	if ${PKG_CONFIG} --exists Qt5Core && ! ${PKG_CONFIG} --exists Qt5Gui; then
+		ewarn "Found Qt5Core but not Qt5Gui; skipping tests"
+	else
+		distutils-r1_src_test
+	fi
+}
+
+python_test() {
+	(
+		# meson has its own tests for LTO support. We don't need to verify that
+		# all tests work when they happen to use it. And in particular, this
+		# breaks rust.
+		filter-lto
+
+		# remove unwanted python_wrapper_setup contents
+		# We actually do want to non-error if python2 is installed and tested.
+		remove="${T}/${EPYTHON}/bin:"
+		PATH=${PATH/${remove}/}
+
+		# test_meson_installed
+		unset PYTHONDONTWRITEBYTECODE
+
+		# https://bugs.gentoo.org/687792
+		unset PKG_CONFIG
+
+		# test_cross_file_system_paths
+		unset XDG_DATA_HOME
+
+		# 'test cases/unit/73 summary' expects 80 columns
+		export COLUMNS=80
+
+		# If JAVA_HOME is not set, meson looks for javac in PATH.
+		# If javac is in /usr/bin, meson assumes /usr/include is a valid
+		# JDK include path. Setting JAVA_HOME works around this broken
+		# autodetection. If no JDK is installed, we should end up with an empty
+		# value in JAVA_HOME, and the tests should get skipped.
+		export JAVA_HOME=$(java-config -O 2>/dev/null)
+
+		${EPYTHON} -u run_tests.py
+	) || die "Testing failed with ${EPYTHON}"
+}
+
+python_install_all() {
+	distutils-r1_python_install_all
+
+	insinto /usr/share/vim/vimfiles
+	doins -r data/syntax-highlighting/vim/{ftdetect,indent,syntax}
+
+	dozshcomp data/shell-completions/zsh/_meson
+	dobashcomp data/shell-completions/bash/meson
+
+	if [[ ${PV} = *9999* ]]; then
+		DESTDIR="${ED}" eninja -C docs/builddir install
+	else
+		newman "${DISTDIR}"/meson-reference-${MY_PV}.3 meson-reference.3
+	fi
+}
diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.9.0_rc1.ebuild b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.9.0_rc1.ebuild
new file mode 100644
index 0000000000..699967ac5f
--- /dev/null
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-1.9.0_rc1.ebuild
@@ -0,0 +1,231 @@
+# Copyright 2016-2025 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+PYTHON_COMPAT=( python3_{11..14} pypy3_11 )
+DISTUTILS_USE_PEP517=setuptools
+
+inherit shell-completion edo distutils-r1 flag-o-matic toolchain-funcs
+
+if [[ ${PV} = *9999* ]]; then
+	EGIT_REPO_URI="https://github.com/mesonbuild/meson"
+	inherit ninja-utils git-r3
+
+	BDEPEND="
+		${NINJA_DEPEND}
+		$(python_gen_any_dep 'dev-python/pyyaml[${PYTHON_USEDEP}]')
+	"
+
+else
+	inherit verify-sig
+
+	MY_PV=${PV/_/}
+	MY_P=${P/_/}
+	S=${WORKDIR}/${MY_P}
+
+	SRC_URI="
+		https://github.com/mesonbuild/meson/releases/download/${MY_PV}/${MY_P}.tar.gz
+		verify-sig? ( https://github.com/mesonbuild/meson/releases/download/${MY_PV}/${MY_P}.tar.gz.asc )
+		https://github.com/mesonbuild/meson/releases/download/${MY_PV}/meson-reference.3 -> meson-reference-${MY_PV}.3
+	"
+	# Releases may be signed by those listed in Releasing.md. Jussi
+	# remains the default release manager.
+	# https://github.com/mesonbuild/meson/commit/c2d795735fa1c46c54d6aed4d4a30f36a1f853cb
+	BDEPEND="verify-sig? ( sec-keys/openpgp-keys-jpakkane )"
+	VERIFY_SIG_OPENPGP_KEY_PATH=/usr/share/openpgp-keys/jpakkane.gpg
+
+	if [[ ${PV} != *_rc* ]] ; then
+		KEYWORDS="~alpha ~amd64 ~arm ~arm64 ~hppa ~loong ~m68k ~mips ~ppc ~ppc64 ~riscv ~s390 ~sparc ~x86 ~amd64-linux ~x86-linux ~arm64-macos ~ppc-macos ~x64-macos ~x64-solaris"
+	fi
+fi
+
+DESCRIPTION="Open source build system"
+HOMEPAGE="https://mesonbuild.com/"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+IUSE="test test-full"
+RESTRICT="!test? ( test )"
+REQUIRED_USE="test-full? ( test )"
+
+DEPEND="
+	test? (
+		dev-libs/glib:2
+		dev-libs/gobject-introspection
+		app-alternatives/ninja
+		dev-vcs/git
+		sys-libs/zlib[static-libs(+)]
+		virtual/pkgconfig
+		dev-build/cmake
+	)
+	test-full? (
+		|| ( dev-lang/rust dev-lang/rust-bin )
+		dev-lang/nasm
+		>=dev-lang/pypy-3
+		dev-lang/vala
+		dev-python/cython
+		virtual/fortran
+		virtual/jdk
+
+		app-text/doxygen
+		dev-cpp/gtest
+		dev-libs/protobuf
+		dev-util/bindgen
+		dev-util/gtk-doc
+		dev-util/itstool
+		llvm-core/llvm
+		media-libs/libsdl2
+		media-libs/libwmf
+		net-libs/libpcap
+		sci-libs/hdf5[fortran]
+		sci-libs/netcdf
+		sys-cluster/openmpi[fortran]
+		sys-devel/bison
+		sys-devel/flex
+
+		dev-qt/linguist-tools:5
+		dev-qt/qtwidgets:5
+		dev-qt/qtbase:6[gui,widgets]
+		dev-qt/qtdeclarative:6
+		dev-qt/qttools:6
+		dev-util/gdbus-codegen
+		x11-libs/gtk+:3
+
+		dev-libs/wayland
+		dev-util/wayland-scanner
+	)
+"
+RDEPEND="
+	!<dev-build/muon-0.2.0-r2[man(-)]
+	virtual/pkgconfig
+"
+
+PATCHES=(
+	"${FILESDIR}"/${PN}-1.2.1-python-path.patch
+)
+
+src_unpack() {
+	if [[ ${PV} = *9999* ]]; then
+		git-r3_src_unpack
+	else
+		default
+		use verify-sig && verify-sig_verify_detached "${DISTDIR}"/${MY_P}.tar.gz{,.asc}
+	fi
+}
+
+python_prepare_all() {
+	local disable_unittests=(
+		# ASAN and sandbox both want control over LD_PRELOAD
+		# https://bugs.gentoo.org/673016
+		-e 's/test_generate_gir_with_address_sanitizer/_&/'
+		-e 's/test_env_cflags_ldflags/_&/'
+		-e 's/test_c_link_args_and_env/_&/'
+
+		# ASAN is unsupported on some targets
+		# https://bugs.gentoo.org/692822
+		-e 's/test_pch_with_address_sanitizer/_&/'
+
+		# clippy-driver fails, but only when run via portage.
+		#
+		#   error[E0463]: can't find crate for `std`
+		#   error: requires `sized` lang_item
+		-e 's/test_rust_clippy/_&/'
+	)
+
+	sed -i "${disable_unittests[@]}" unittests/*.py || die
+
+	# Broken due to python2 script created by python_wrapper_setup
+	rm -r "test cases/frameworks/1 boost" || die
+	# nvcc breaks on essentially any LDFLAGS
+	# https://bugs.gentoo.org/936757
+	# https://github.com/mesonbuild/meson/issues/11234
+	rm -r "test cases/cuda"/* || die
+
+	distutils-r1_python_prepare_all
+}
+
+python_check_deps() {
+	if [[ ${PV} = *9999* ]]; then
+		python_has_version "dev-python/pyyaml[${PYTHON_USEDEP}]"
+	fi
+}
+
+python_configure_all() {
+	if [[ ${PV} = *9999* ]]; then
+		# We use the unsafe_yaml loader because strictyaml is not packaged. In
+		# theory they produce the same results, but pyyaml is faster and
+		# without safety checks.
+		edo ./meson.py setup \
+			--prefix "${EPREFIX}/usr" \
+			-Dhtml=false \
+			-Dunsafe_yaml=true \
+			docs/ docs/builddir
+	fi
+}
+
+python_compile_all() {
+	if [[ ${PV} = *9999* ]]; then
+		eninja -C docs/builddir
+	fi
+}
+
+src_test() {
+	tc-export PKG_CONFIG
+	if ${PKG_CONFIG} --exists Qt5Core && ! ${PKG_CONFIG} --exists Qt5Gui; then
+		ewarn "Found Qt5Core but not Qt5Gui; skipping tests"
+	else
+		distutils-r1_src_test
+	fi
+}
+
+python_test() {
+	(
+		# meson has its own tests for LTO support. We don't need to verify that
+		# all tests work when they happen to use it. And in particular, this
+		# breaks rust.
+		filter-lto
+
+		# remove unwanted python_wrapper_setup contents
+		# We actually do want to non-error if python2 is installed and tested.
+		remove="${T}/${EPYTHON}/bin:"
+		PATH=${PATH/${remove}/}
+
+		# test_meson_installed
+		unset PYTHONDONTWRITEBYTECODE
+
+		# https://bugs.gentoo.org/687792
+		unset PKG_CONFIG
+
+		# test_cross_file_system_paths
+		unset XDG_DATA_HOME
+
+		# 'test cases/unit/73 summary' expects 80 columns
+		export COLUMNS=80
+
+		# If JAVA_HOME is not set, meson looks for javac in PATH.
+		# If javac is in /usr/bin, meson assumes /usr/include is a valid
+		# JDK include path. Setting JAVA_HOME works around this broken
+		# autodetection. If no JDK is installed, we should end up with an empty
+		# value in JAVA_HOME, and the tests should get skipped.
+		export JAVA_HOME=$(java-config -O 2>/dev/null)
+
+		${EPYTHON} -u run_tests.py
+	) || die "Testing failed with ${EPYTHON}"
+}
+
+python_install_all() {
+	distutils-r1_python_install_all
+
+	insinto /usr/share/vim/vimfiles
+	doins -r data/syntax-highlighting/vim/{ftdetect,indent,syntax}
+
+	dozshcomp data/shell-completions/zsh/_meson
+	dobashcomp data/shell-completions/bash/meson
+
+	if [[ ${PV} = *9999* ]]; then
+		DESTDIR="${ED}" eninja -C docs/builddir install
+	else
+		newman "${DISTDIR}"/meson-reference-${MY_PV}.3 meson-reference.3
+	fi
+}
diff --git a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-9999.ebuild b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-9999.ebuild
index dcb9ffd206..699967ac5f 100644
--- a/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-9999.ebuild
+++ b/sdk_container/src/third_party/portage-stable/dev-build/meson/meson-9999.ebuild
@@ -3,7 +3,7 @@
 
 EAPI=8
 
-PYTHON_COMPAT=( python3_{10..13} pypy3 pypy3_11 )
+PYTHON_COMPAT=( python3_{11..14} pypy3_11 )
 DISTUTILS_USE_PEP517=setuptools
 
 inherit shell-completion edo distutils-r1 flag-o-matic toolchain-funcs
@@ -87,6 +87,7 @@ DEPEND="
 		dev-qt/linguist-tools:5
 		dev-qt/qtwidgets:5
 		dev-qt/qtbase:6[gui,widgets]
+		dev-qt/qtdeclarative:6
 		dev-qt/qttools:6
 		dev-util/gdbus-codegen
 		x11-libs/gtk+:3
@@ -119,6 +120,7 @@ python_prepare_all() {
 		# https://bugs.gentoo.org/673016
 		-e 's/test_generate_gir_with_address_sanitizer/_&/'
 		-e 's/test_env_cflags_ldflags/_&/'
+		-e 's/test_c_link_args_and_env/_&/'
 
 		# ASAN is unsupported on some targets
 		# https://bugs.gentoo.org/692822