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diff --git a/app-eselect/eselect-lapack/files/lapack.eselect-0.3 b/app-eselect/eselect-lapack/files/lapack.eselect-0.3
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+++ b/app-eselect/eselect-lapack/files/lapack.eselect-0.3
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+# -*-eselect-*-  vim: ft=eselect
+# Copyright 2019-2023 Gentoo Authors
+# Distributed under the terms of the GNU GPL version 2 or later
+
+inherit config tests multilib skel
+
+MODULE="LAPACK"
+IFACE="lapack"
+DESCRIPTION="Manage installed alternatives of $MODULE shared objects"
+MAINTAINER="lumin@debian.org"
+VERSION="0.3"
+
+### helper utility to find all available LAPACK implementations
+find_targets_in() {
+	[[ $# -eq 1 ]] || die -q "in which libdir?"
+
+	local cand
+	for cand in "${EROOT}/etc/env.d/lapack/$1"/*; do
+		[[ "config" = $(basename ${cand}) ]] && continue
+		[[ -r ${cand} ]] && basename ${cand}
+	done
+}
+
+### helper utility to validate a LAPACK library directory
+validate_lapacklibdir() {
+	[[ -d $1 ]] || return 2  # dir doesn't exist
+	[[ -r "${1}/liblapack.so.3" ]] && [[ -r "${1}/liblapack.so" ]] \
+	|| return 1
+}
+
+### show action
+do_show() {
+	# do_show -- show both lib64 and lib32 selection
+	# do_show libxx -- show libxx selection
+	local libdir cur libdirs=( $(list_libdirs) )
+
+	# if manually specified libdirs
+	if [[ ! $# -eq 0 ]]; then
+		for libdir in $@; do
+			has $libdir ${libdirs[@]} || die -q "invalid libdir '$libdir'!"
+		done
+		libdirs=( $@ )
+	fi
+
+	for libdir in ${libdirs[@]}; do
+		[[ ! -d ${EROOT}/usr/$libdir ]] && continue
+		[[ ! -r ${EROOT}/etc/env.d/lapack/${libdir}/config ]] && continue
+		cur=$(load_config "${EROOT}"/etc/env.d/lapack/${libdir}/config CURRENT)
+		echo ${libdir}: $cur
+	done
+}
+
+### list action
+do_list() {
+	local i cur targets
+	local libdir libdirs=( $(list_libdirs) )
+
+	# if manually specified libdirs
+	if [[ ! $# -eq 0 ]]; then
+		for libdir in $@; do
+			has $libdir ${libdirs[@]} || die -q "invalid libdir '$libdir'!"
+		done
+		libdirs=( $@ )
+	fi
+
+	for libdir in ${libdirs[@]}; do
+		[[ ! -d ${EROOT}/usr/$libdir ]] || [[ -L ${EROOT}/usr/$libdir ]] && continue
+		targets=( $(find_targets_in $libdir) )
+		cur=$(load_config "${EROOT}"/etc/env.d/lapack/${libdir}/config CURRENT)
+
+		write_list_start "Available LAPACK ($libdir) candidates:"
+		for (( i = 0; i < ${#targets[@]}; i++ )); do
+			[[ ${targets[i]} = $cur ]] \
+			&& targets[i]=$(highlight_marker "${targets[i]}")
+		done
+		write_numbered_list -m "(none found)" "${targets[@]}"
+	done
+}
+
+### validate action
+describe_validate() {
+	echo "validate candidates and remove invalid ones"
+}
+
+do_validate() {
+	local i ldpath targets target candidate
+	local libdir libdirs=( $(list_libdirs) )
+	for libdir in ${libdirs[@]}; do
+		[[ ! -d ${EROOT}/usr/$libdir ]] || [[ -L ${EROOT}/usr/$libdir ]] && continue
+		targets=( $(find_targets_in $libdir) )
+		for target in ${targets[@]}; do
+			candidate=${EROOT}/etc/env.d/lapack/${libdir}/${target}
+			ldpath=$(load_config "$candidate" LDPATH)
+			if ! validate_lapacklibdir "${ROOT}/$ldpath"; then
+				echo "Removing invalid LAPACK candidate ($candidate) ..."
+				rm -v "$candidate"
+			fi
+		done
+	done
+}
+
+### set action
+
+describe_set() {
+        echo "Activate one of the installed $MODULE implementations"
+}
+
+describe_set_parameters() {
+        echo "[<libdir>] <implementation>"
+}
+
+describe_set_options() {
+	echo "libdir: lib64 or lib32. Will use the native one when omitted."
+        echo "implementation : implementation name or number (from 'list' action)"
+}
+
+do_set() {
+	local libdirs=( $(list_libdirs) )
+	local targets libdir ldconf libpath impl
+
+	# check argument existence
+	[[ $# -eq 1 ]] || [[ $# -eq 2 ]] || \
+		die -q "Please specify [<libdir>] <impl> to activate!"
+	# read argumenets
+	if [[ $# -eq 2 ]]; then libdir="$1"; else libdir="$(get_libdir)"; fi
+	if [[ $# -eq 2 ]]; then impl="$2"; else impl="$1"; fi
+	# validate arguments
+	has "$libdir" "${libdirs[@]}" || die -q "Invalid libdir ($libdir) !"
+	targets=( $(find_targets_in $libdir) )
+	if ! has "$impl" "${targets[@]}"; then
+		if [[ ${impl} -gt 0 ]] && [[ ${impl} -le ${#targets[@]} ]]; then
+			impl=${targets[(${impl} - 1)]}
+		else
+			die -q "Invalid impl ($impl) !"
+		fi
+	fi
+	# store the configuration to env.d
+	store_config "${EROOT}"/etc/env.d/lapack/${libdir}/config CURRENT "${impl}"
+	# generate ld.so.conf file
+	ldconf="${EROOT}/etc/ld.so.conf.d/82-lapack-${libdir}.conf"
+	libpath=$(load_config ${EROOT}/etc/env.d/lapack/${libdir}/${impl} LDPATH)
+	truncate -s0 "$ldconf"
+	echo "# Auto-generated by eselect::lapack. DON'T EDIT." >> "$ldconf"
+	echo "$libpath" >> "$ldconf"
+
+	# refresh cache. env-update will call ldconfig (see
+	# portage::env_update.py) so we don't need to call it explicitly.
+	env-update
+}
+
+### add action
+describe_add_parameters() {
+	echo "<libdir> <dir> <impl>"
+}
+
+describe_add_options() {
+	echo "libdir : library directory where $MODULE implementation is installed (lib, lib64, etc.)"
+	echo "dir : directory containing liblapack.so{.3}"
+	echo "impl : name of the $MODULE implementation"
+}
+
+do_add() {
+	[[ $# -eq 3 ]] \
+		|| die -q "Please specify <libdir> <dir> <impl> to activate!"
+	validate_lapacklibdir "${ROOT}/$2" || die -q "invalid lapack libdir!"
+	store_config "${EROOT}/etc/env.d/lapack/$1/$3" LDPATH "$2"
+}