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diff --git a/dev-python/qiskit-aer/qiskit-aer-0.12.0.ebuild b/dev-python/qiskit-aer/qiskit-aer-0.12.0.ebuild
new file mode 100644
index 000000000000..19dedbf6bb29
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+++ b/dev-python/qiskit-aer/qiskit-aer-0.12.0.ebuild
@@ -0,0 +1,122 @@
+# Copyright 2022-2023 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=8
+
+DISTUTILS_USE_PEP517=setuptools
+PYTHON_COMPAT=( python3_{9..11} )
+
+inherit distutils-r1 multiprocessing
+
+DESCRIPTION="High performance simulator for quantum circuits that includes noise models"
+HOMEPAGE="
+	https://github.com/Qiskit/qiskit-aer/
+	https://pypi.org/project/qiskit-aer/
+"
+SRC_URI="
+	https://github.com/Qiskit/qiskit-aer/archive/${PV}.tar.gz
+		-> ${P}.gh.tar.gz
+"
+
+LICENSE="Apache-2.0"
+SLOT="0"
+# Tests fail: https://github.com/Qiskit/qiskit-aer/issues/1742
+#KEYWORDS="~amd64"
+
+# The reference implementation of BLAS/CBLAS is not compatible with qiskit-aer right now,
+# because importing library causes an error.
+# /usr/lib/python3.9/site-packages/qiskit/providers/aer/backends/controller_wrappers.cpython-39-x86_64-linux-gnu.so: undefined symbol: slamch_
+# Using sci-libs/openblas instead here,
+# with the option to switch between reference/openblas implementation runtime (eselect-ldso).
+DEPEND="
+	>=dev-python/numpy-1.16.3[${PYTHON_USEDEP}]
+	>=dev-cpp/nlohmann_json-3.1.1
+	>=dev-libs/spdlog-1.9.2:=
+	>=dev-cpp/muParserX-4.0.8
+	virtual/cblas[eselect-ldso]
+	sci-libs/openblas[eselect-ldso]
+"
+RDEPEND="
+	${DEPEND}
+	>=dev-python/qiskit-terra-0.21.0[${PYTHON_USEDEP}]
+	>=dev-python/scipy-1.0[${PYTHON_USEDEP}]
+"
+BDEPEND="
+	>=dev-util/cmake-3.17
+	>=dev-python/scikit-build-0.11.0[${PYTHON_USEDEP}]
+	>=dev-python/pybind11-2.6[${PYTHON_USEDEP}]
+	test? (
+		dev-python/ddt[${PYTHON_USEDEP}]
+		dev-python/fixtures[${PYTHON_USEDEP}]
+		dev-python/pytest-xdist[${PYTHON_USEDEP}]
+	)
+"
+
+PATCHES=(
+	# Remove cmake dependency from setup.py because of
+	# invalid dependency description. We put this dependency check in BDEPEND.
+	"${FILESDIR}"/${PN}-0.12.0-remove-cmake-dependency.patch
+	"${FILESDIR}"/${PN}-0.12.0-wheel-dep.patch
+)
+
+distutils_enable_tests pytest
+
+check_openblas() {
+	local libdir=$(get_libdir) me="openblas"
+
+	# check blas
+	local current_blas=$(eselect blas show ${libdir} | cut -d' ' -f2)
+	if [[ ${current_blas} != "${me}" ]]; then
+		eerror "Current eselect: BLAS/CBLAS ($libdir) -> [${current_blas}]."
+		eerror "To use qiskit-aer, you have to issue (as root):"
+		eerror "\t eselect blas set ${libdir} ${me}"
+		return 1
+	fi
+	return 0
+}
+
+pkg_setup() {
+	if use test; then
+		check_openblas
+		if [[ $? -ne 0 ]]; then
+			die "Set blas implementation to openblas using 'eselect blas set openblas'!"
+		fi
+	fi
+}
+
+python_prepare_all() {
+	export DISABLE_CONAN="ON"
+	export DISABLE_DEPENDENCY_INSTALL="ON"
+	#export SKBUILD_CONFIGURE_OPTIONS=""
+
+	distutils-r1_python_prepare_all
+}
+
+python_test() {
+	local EPYTEST_DESELECT=(
+		# TODO
+		test/terra/states/test_aer_statevector.py::TestAerStatevector::test_drawings
+		test/terra/states/test_aer_state.py::TestAerState::test_appply_diagonal
+		test/terra/states/test_aer_state.py::TestAerState::test_appply_measure
+		test/terra/states/test_aer_state.py::TestAerState::test_appply_reset
+
+		# TODO: GLIBCXX_ASSERTIONS, bug #897758
+		test/terra/backends/aer_simulator/test_algorithms.py::TestAlgorithms::test_extended_stabilizer_sparse_output_probs
+		test/terra/backends/aer_simulator/test_options.py::TestOptions::test_mps_options
+		test/terra/backends/aer_simulator/test_fusion.py::TestGateFusion::test_parallel_fusion_diagonal
+	)
+
+
+	# From tox.ini/tests.yml in CI
+	# Needed to suppress a warning in jupyter-core 5.x by eagerly migrating to
+	# a new internal interface that will be the default in jupyter-core 6.x.
+	# This variable should become redundant on release of jupyter-core 6.
+	local -x JUPYTER_PLATFORM_DIRS=1
+
+	rm -rf qiskit_aer || die
+	epytest -s #-n "$(makeopts_jobs)" -s
+}
+
+pkg_postinst() {
+	check_openblas
+}