diff --git a/.gitignore b/.gitignore
index a377f5d..19ac04c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,3 +11,4 @@ build/
 *.pem
 user-data
 meta-data
+*.qcow2
diff --git a/mkarchiso b/mkarchiso
deleted file mode 100755
index b683d48..0000000
--- a/mkarchiso
+++ /dev/null
@@ -1,1682 +0,0 @@
-#!/usr/bin/env bash
-#
-# SPDX-License-Identifier: GPL-3.0-or-later
-
-set -e -u
-
-# Control the environment
-umask 0022
-export LC_ALL="C.UTF-8"
-[[ -v SOURCE_DATE_EPOCH ]] || printf -v SOURCE_DATE_EPOCH '%(%s)T' -1
-export SOURCE_DATE_EPOCH
-
-# Set application name from the script's file name
-app_name="${0##*/}"
-
-# Define global variables. All of them will be overwritten later
-pkg_list=()
-bootstrap_pkg_list=()
-quiet=""
-work_dir=""
-out_dir=""
-gpg_key=""
-gpg_sender=""
-iso_name=""
-iso_label=""
-iso_publisher=""
-iso_application=""
-iso_version=""
-install_dir=""
-arch=""
-pacman_conf=""
-packages=""
-bootstrap_packages=""
-pacstrap_dir=""
-buildmodes=()
-bootmodes=()
-airootfs_image_type=""
-airootfs_image_tool_options=()
-cert_list=()
-sign_netboot_artifacts=""
-declare -A file_permissions=()
-efiboot_files=()
-# adapted from GRUB_EARLY_INITRD_LINUX_STOCK in https://git.savannah.gnu.org/cgit/grub.git/tree/util/grub-mkconfig.in
-readonly ucodes=('intel-uc.img' 'intel-ucode.img' 'amd-uc.img' 'amd-ucode.img' 'early_ucode.cpio' 'microcode.cpio')
-
-
-# Show an INFO message
-# $1: message string
-_msg_info() {
-    local _msg="${1}"
-    [[ "${quiet}" == "y" ]] || printf '[%s] INFO: %s\n' "${app_name}" "${_msg}"
-}
-
-# Show a WARNING message
-# $1: message string
-_msg_warning() {
-    local _msg="${1}"
-    printf '[%s] WARNING: %s\n' "${app_name}" "${_msg}" >&2
-}
-
-# Show an ERROR message then exit with status
-# $1: message string
-# $2: exit code number (with 0 does not exit)
-_msg_error() {
-    local _msg="${1}"
-    local _error=${2}
-    printf '[%s] ERROR: %s\n' "${app_name}" "${_msg}" >&2
-    if (( _error > 0 )); then
-        exit "${_error}"
-    fi
-}
-
-# Show help usage, with an exit status.
-# $1: exit status number.
-_usage() {
-    IFS='' read -r -d '' usagetext <<ENDUSAGETEXT || true
-usage: ${app_name} [options] <profile_dir>
-  options:
-     -A <application> Set an application name for the ISO
-                      Default: '${iso_application}'
-     -C <file>        pacman configuration file.
-                      Default: '${pacman_conf}'
-     -D <install_dir> Set an install_dir. All files will by located here.
-                      Default: '${install_dir}'
-                      NOTE: Max 8 characters, use only [a-z0-9]
-     -L <label>       Set the ISO volume label
-                      Default: '${iso_label}'
-     -P <publisher>   Set the ISO publisher
-                      Default: '${iso_publisher}'
-     -c [cert ..]     Provide certificates for codesigning of netboot artifacts
-                      Multiple files are provided as quoted, space delimited list.
-                      The first file is considered as the signing certificate,
-                      the second as the key.
-     -g <gpg_key>     Set the PGP key ID to be used for signing the rootfs image.
-                      Passed to gpg as the value for --default-key
-     -G <mbox>        Set the PGP signer (must include an email address)
-                      Passed to gpg as the value for --sender
-     -h               This message
-     -m [mode ..]     Build mode(s) to use (valid modes are: 'bootstrap', 'iso' and 'netboot').
-                      Multiple build modes are provided as quoted, space delimited list.
-     -o <out_dir>     Set the output directory
-                      Default: '${out_dir}'
-     -p [package ..]  Package(s) to install.
-                      Multiple packages are provided as quoted, space delimited list.
-     -v               Enable verbose output
-     -w <work_dir>    Set the working directory
-                      Default: '${work_dir}'
-
-  profile_dir:        Directory of the archiso profile to build
-ENDUSAGETEXT
-    printf '%s' "${usagetext}"
-    exit "${1}"
-}
-
-# Shows configuration options.
-_show_config() {
-    local build_date
-    printf -v build_date '%(%FT%R%z)T' "${SOURCE_DATE_EPOCH}"
-    _msg_info "${app_name} configuration settings"
-    _msg_info "             Architecture:   ${arch}"
-    _msg_info "        Working directory:   ${work_dir}"
-    _msg_info "   Installation directory:   ${install_dir}"
-    _msg_info "               Build date:   ${build_date}"
-    _msg_info "         Output directory:   ${out_dir}"
-    _msg_info "       Current build mode:   ${buildmode}"
-    _msg_info "              Build modes:   ${buildmodes[*]}"
-    _msg_info "                  GPG key:   ${gpg_key:-None}"
-    _msg_info "               GPG signer:   ${gpg_sender:-None}"
-    _msg_info "Code signing certificates:   ${cert_list[*]:-None}"
-    _msg_info "                  Profile:   ${profile}"
-    _msg_info "Pacman configuration file:   ${pacman_conf}"
-    _msg_info "          Image file name:   ${image_name:-None}"
-    _msg_info "         ISO volume label:   ${iso_label}"
-    _msg_info "            ISO publisher:   ${iso_publisher}"
-    _msg_info "          ISO application:   ${iso_application}"
-    _msg_info "               Boot modes:   ${bootmodes[*]:-None}"
-    _msg_info "            Packages File:   ${buildmode_packages}"
-    _msg_info "                 Packages:   ${buildmode_pkg_list[*]}"
-}
-
-# Cleanup airootfs
-_cleanup_pacstrap_dir() {
-    _msg_info "Cleaning up in pacstrap location..."
-
-    # Delete all files in /boot
-    [[ -d "${pacstrap_dir}/boot" ]] && find "${pacstrap_dir}/boot" -mindepth 1 -delete
-    # Delete pacman database sync cache files (*.tar.gz)
-    [[ -d "${pacstrap_dir}/var/lib/pacman" ]] && find "${pacstrap_dir}/var/lib/pacman" -maxdepth 1 -type f -delete
-    # Delete pacman database sync cache
-    [[ -d "${pacstrap_dir}/var/lib/pacman/sync" ]] && find "${pacstrap_dir}/var/lib/pacman/sync" -delete
-    # Delete pacman package cache
-    [[ -d "${pacstrap_dir}/var/cache/pacman/pkg" ]] && find "${pacstrap_dir}/var/cache/pacman/pkg" -type f -delete
-    # Delete all log files, keeps empty dirs.
-    [[ -d "${pacstrap_dir}/var/log" ]] && find "${pacstrap_dir}/var/log" -type f -delete
-    # Delete all temporary files and dirs
-    [[ -d "${pacstrap_dir}/var/tmp" ]] && find "${pacstrap_dir}/var/tmp" -mindepth 1 -delete
-    # Delete package pacman related files.
-    find "${work_dir}" \( -name '*.pacnew' -o -name '*.pacsave' -o -name '*.pacorig' \) -delete
-    # Create an empty /etc/machine-id
-    rm -f -- "${pacstrap_dir}/etc/machine-id"
-    printf '' > "${pacstrap_dir}/etc/machine-id"
-
-    _msg_info "Done!"
-}
-
-# Create a squashfs image and place it in the ISO 9660 file system.
-# $@: options to pass to mksquashfs
-_run_mksquashfs() {
-    local mksquashfs_options=() image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
-    rm -f -- "${image_path}"
-    [[ ! "${quiet}" == "y" ]] || mksquashfs_options+=('-no-progress' '-quiet')
-    mksquashfs "$@" "${image_path}" -noappend "${airootfs_image_tool_options[@]}" "${mksquashfs_options[@]}"
-}
-
-# Create an ext4 image containing the root file system and pack it inside a squashfs image.
-# Save the squashfs image on the ISO 9660 file system.
-_mkairootfs_ext4+squashfs() {
-    local ext4_hash_seed mkfs_ext4_options=()
-    [[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
-
-    _msg_info "Creating ext4 image of 32 GiB and copying '${pacstrap_dir}/' to it..."
-
-    ext4_hash_seed="$(uuidgen --sha1 --namespace 93a870ff-8565-4cf3-a67b-f47299271a96 \
-        --name "${SOURCE_DATE_EPOCH} ext4 hash seed")"
-    mkfs_ext4_options=(
-        '-d' "${pacstrap_dir}"
-        '-O' '^has_journal,^resize_inode'
-        '-E' "lazy_itable_init=0,root_owner=0:0,hash_seed=${ext4_hash_seed}"
-        '-m' '0'
-        '-F'
-        '-U' 'clear'
-    )
-    [[ ! "${quiet}" == "y" ]] || mkfs_ext4_options+=('-q')
-    rm -f -- "${pacstrap_dir}.img"
-    E2FSPROGS_FAKE_TIME="${SOURCE_DATE_EPOCH}" mkfs.ext4 "${mkfs_ext4_options[@]}" -- "${pacstrap_dir}.img" 32G
-    tune2fs -c 0 -i 0 -- "${pacstrap_dir}.img" > /dev/null
-    _msg_info "Done!"
-
-    install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
-    _msg_info "Creating SquashFS image, this may take some time..."
-    _run_mksquashfs "${pacstrap_dir}.img"
-    _msg_info "Done!"
-    rm -- "${pacstrap_dir}.img"
-}
-
-# Create a squashfs image containing the root file system and saves it on the ISO 9660 file system.
-_mkairootfs_squashfs() {
-    [[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
-
-    install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
-    _msg_info "Creating SquashFS image, this may take some time..."
-    _run_mksquashfs "${pacstrap_dir}"
-}
-
-# Create an EROFS image containing the root file system and saves it on the ISO 9660 file system.
-_mkairootfs_erofs() {
-    local fsuuid mkfs_erofs_options=()
-    [[ -e "${pacstrap_dir}" ]] || _msg_error "The path '${pacstrap_dir}' does not exist" 1
-
-    install -d -m 0755 -- "${isofs_dir}/${install_dir}/${arch}"
-    local image_path="${isofs_dir}/${install_dir}/${arch}/airootfs.erofs"
-    rm -f -- "${image_path}"
-    [[ ! "${quiet}" == "y" ]] || mkfs_erofs_options+=('--quiet')
-    # Generate reproducible file system UUID from SOURCE_DATE_EPOCH
-    fsuuid="$(uuidgen --sha1 --namespace 93a870ff-8565-4cf3-a67b-f47299271a96 --name "${SOURCE_DATE_EPOCH}")"
-    mkfs_erofs_options+=('-U' "${fsuuid}" "${airootfs_image_tool_options[@]}")
-    _msg_info "Creating EROFS image, this may take some time..."
-    mkfs.erofs "${mkfs_erofs_options[@]}" -- "${image_path}" "${pacstrap_dir}"
-    _msg_info "Done!"
-}
-
-# Create checksum file for the rootfs image.
-_mkchecksum() {
-    _msg_info "Creating checksum file for self-test..."
-    cd -- "${isofs_dir}/${install_dir}/${arch}"
-    if [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" ]]; then
-        sha512sum airootfs.sfs > airootfs.sha512
-    elif [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.erofs" ]]; then
-        sha512sum airootfs.erofs > airootfs.sha512
-    fi
-    cd -- "${OLDPWD}"
-    _msg_info "Done!"
-}
-
-# GPG sign the root file system image.
-_mksignature() {
-    local airootfs_image_filename gpg_options=()
-    _msg_info "Signing rootfs image..."
-    if [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.sfs" ]]; then
-        airootfs_image_filename="${isofs_dir}/${install_dir}/${arch}/airootfs.sfs"
-    elif [[ -e "${isofs_dir}/${install_dir}/${arch}/airootfs.erofs" ]]; then
-        airootfs_image_filename="${isofs_dir}/${install_dir}/${arch}/airootfs.erofs"
-    fi
-    rm -f -- "${airootfs_image_filename}.sig"
-    # Add gpg sender option if the value is provided
-    [[ -z "${gpg_sender}" ]] || gpg_options+=('--sender' "${gpg_sender}")
-    # always use the .sig file extension, as that is what mkinitcpio-archiso's hooks expect
-    gpg --batch --no-armor --no-include-key-block --output "${airootfs_image_filename}.sig" --detach-sign \
-        --default-key "${gpg_key}" "${gpg_options[@]}" "${airootfs_image_filename}"
-    _msg_info "Done!"
-}
-
-# Helper function to run functions only one time.
-# $1: function name
-_run_once() {
-    if [[ ! -e "${work_dir}/${run_once_mode}.${1}" ]]; then
-        "$1"
-        touch "${work_dir}/${run_once_mode}.${1}"
-    fi
-}
-
-# Set up custom pacman.conf with custom cache and pacman hook directories.
-_make_pacman_conf() {
-    local _cache_dirs _system_cache_dirs _profile_cache_dirs
-    _system_cache_dirs="$(pacman-conf CacheDir| tr '\n' ' ')"
-    _profile_cache_dirs="$(pacman-conf --config "${pacman_conf}" CacheDir| tr '\n' ' ')"
-
-    # Only use the profile's CacheDir, if it is not the default and not the same as the system cache dir.
-    if [[ "${_profile_cache_dirs}" != "/var/cache/pacman/pkg" ]] && \
-        [[ "${_system_cache_dirs}" != "${_profile_cache_dirs}" ]]; then
-        _cache_dirs="${_profile_cache_dirs}"
-    else
-        _cache_dirs="${_system_cache_dirs}"
-    fi
-
-    _msg_info "Copying custom pacman.conf to work directory..."
-    _msg_info "Using pacman CacheDir: ${_cache_dirs}"
-    # take the profile pacman.conf and strip all settings that would break in chroot when using pacman -r
-    # append CacheDir and HookDir to [options] section
-    # HookDir is *always* set to the airootfs' override directory
-    # see `man 8 pacman` for further info
-    pacman-conf --config "${pacman_conf}" | \
-        sed "/CacheDir/d;/DBPath/d;/HookDir/d;/LogFile/d;/RootDir/d;/\[options\]/a CacheDir = ${_cache_dirs}
-        /\[options\]/a HookDir = ${pacstrap_dir}/etc/pacman.d/hooks/" > "${work_dir}/${buildmode}.pacman.conf"
-}
-
-# Prepare working directory and copy custom root file system files.
-_make_custom_airootfs() {
-    local passwd=()
-    local filename permissions
-
-    install -d -m 0755 -o 0 -g 0 -- "${pacstrap_dir}"
-
-    if [[ -d "${profile}/airootfs" ]]; then
-        _msg_info "Copying custom airootfs files..."
-        cp -af --no-preserve=ownership,mode -- "${profile}/airootfs/." "${pacstrap_dir}"
-        # Set ownership and mode for files and directories
-        for filename in "${!file_permissions[@]}"; do
-            IFS=':' read -ra permissions <<< "${file_permissions["${filename}"]}"
-            # Prevent file path traversal outside of $pacstrap_dir
-            if [[ "$(realpath -q -- "${pacstrap_dir}${filename}")" != "${pacstrap_dir}"* ]]; then
-                _msg_error "Failed to set permissions on '${pacstrap_dir}${filename}'. Outside of valid path." 1
-            # Warn if the file does not exist
-            elif [[ ! -e "${pacstrap_dir}${filename}" ]]; then
-                _msg_warning "Cannot change permissions of '${pacstrap_dir}${filename}'. The file or directory does not exist."
-            else
-                if [[ "${filename: -1}" == "/" ]]; then
-                    chown -fhR -- "${permissions[0]}:${permissions[1]}" "${pacstrap_dir}${filename}"
-                    chmod -fR -- "${permissions[2]}" "${pacstrap_dir}${filename}"
-                else
-                    chown -fh -- "${permissions[0]}:${permissions[1]}" "${pacstrap_dir}${filename}"
-                    chmod -f -- "${permissions[2]}" "${pacstrap_dir}${filename}"
-                fi
-            fi
-        done
-        _msg_info "Done!"
-    fi
-}
-
-# Install desired packages to the root file system
-_make_packages() {
-    _msg_info "Installing packages to '${pacstrap_dir}/'..."
-
-    if [[ -n "${gpg_key}" ]]; then
-        exec {ARCHISO_GNUPG_FD}<>"${work_dir}/pubkey.gpg"
-        export ARCHISO_GNUPG_FD
-    fi
-
-    # Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
-    if [[ "${quiet}" = "y" ]]; then
-        env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}" &> /dev/null
-    else
-        env -u TMPDIR pacstrap -C "${work_dir}/${buildmode}.pacman.conf" -c -G -M -- "${pacstrap_dir}" "${buildmode_pkg_list[@]}"
-    fi
-
-    if [[ -n "${gpg_key}" ]]; then
-        exec {ARCHISO_GNUPG_FD}<&-
-        unset ARCHISO_GNUPG_FD
-    fi
-
-    _msg_info "Done! Packages installed successfully."
-}
-
-# Customize installation.
-_make_customize_airootfs() {
-    local passwd=()
-
-    if [[ -e "${profile}/airootfs/etc/passwd" ]]; then
-        _msg_info "Copying /etc/skel/* to user homes..."
-        while IFS=':' read -a passwd -r; do
-            # Only operate on UIDs in range 1000–59999
-            (( passwd[2] >= 1000 && passwd[2] < 60000 )) || continue
-            # Skip invalid home directories
-            [[ "${passwd[5]}" == '/' ]] && continue
-            [[ -z "${passwd[5]}" ]] && continue
-            # Prevent path traversal outside of $pacstrap_dir
-            if [[ "$(realpath -q -- "${pacstrap_dir}${passwd[5]}")" == "${pacstrap_dir}"* ]]; then
-                if [[ ! -d "${pacstrap_dir}${passwd[5]}" ]]; then
-                    install -d -m 0750 -o "${passwd[2]}" -g "${passwd[3]}" -- "${pacstrap_dir}${passwd[5]}"
-                fi
-                cp -dnRT --preserve=mode,timestamps,links -- "${pacstrap_dir}/etc/skel/." "${pacstrap_dir}${passwd[5]}"
-                chmod -f 0750 -- "${pacstrap_dir}${passwd[5]}"
-                chown -hR -- "${passwd[2]}:${passwd[3]}" "${pacstrap_dir}${passwd[5]}"
-            else
-                _msg_error "Failed to set permissions on '${pacstrap_dir}${passwd[5]}'. Outside of valid path." 1
-            fi
-        done < "${profile}/airootfs/etc/passwd"
-        _msg_info "Done!"
-    fi
-
-    if [[ -e "${pacstrap_dir}/root/customize_airootfs.sh" ]]; then
-        _msg_info "Running customize_airootfs.sh in '${pacstrap_dir}' chroot..."
-        _msg_warning "customize_airootfs.sh is deprecated! Support for it will be removed in a future archiso version."
-        chmod -f -- +x "${pacstrap_dir}/root/customize_airootfs.sh"
-        # Unset TMPDIR to work around https://bugs.archlinux.org/task/70580
-        eval -- env -u TMPDIR arch-chroot "${pacstrap_dir}" "/root/customize_airootfs.sh"
-        rm -- "${pacstrap_dir}/root/customize_airootfs.sh"
-        _msg_info "Done! customize_airootfs.sh run successfully."
-    fi
-}
-
-# Set up boot loaders
-_make_bootmodes() {
-    local bootmode
-    for bootmode in "${bootmodes[@]}"; do
-        _run_once "_make_bootmode_${bootmode}"
-    done
-}
-
-# Copy kernel and initramfs to ISO 9660
-_make_boot_on_iso9660() {
-    local ucode_image
-    _msg_info "Preparing kernel and initramfs for the ISO 9660 file system..."
-    install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/${arch}"
-    install -m 0644 -- "${pacstrap_dir}/boot/initramfs-"*".img" "${isofs_dir}/${install_dir}/boot/${arch}/"
-    install -m 0644 -- "${pacstrap_dir}/boot/vmlinuz-"* "${isofs_dir}/${install_dir}/boot/${arch}/"
-
-    for ucode_image in "${ucodes[@]}"; do
-        if [[ -e "${pacstrap_dir}/boot/${ucode_image}" ]]; then
-            install -m 0644 -- "${pacstrap_dir}/boot/${ucode_image}" "${isofs_dir}/${install_dir}/boot/"
-            if [[ -e "${pacstrap_dir}/usr/share/licenses/${ucode_image%.*}/" ]]; then
-                install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
-                install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/${ucode_image%.*}/"* \
-                    "${isofs_dir}/${install_dir}/boot/licenses/${ucode_image%.*}/"
-            fi
-        fi
-    done
-    _msg_info "Done!"
-}
-
-# Prepare syslinux for booting from MBR (isohybrid)
-_make_bootmode_bios.syslinux.mbr() {
-    _msg_info "Setting up SYSLINUX for BIOS booting from a disk..."
-    install -d -m 0755 -- "${isofs_dir}/syslinux"
-    for _cfg in "${profile}/syslinux/"*.cfg; do
-        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
-             s|%INSTALL_DIR%|${install_dir}|g;
-             s|%ARCH%|${arch}|g" \
-             "${_cfg}" > "${isofs_dir}/syslinux/${_cfg##*/}"
-    done
-    if [[ -e "${profile}/syslinux/splash.png" ]]; then
-        install -m 0644 -- "${profile}/syslinux/splash.png" "${isofs_dir}/syslinux/"
-    fi
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/"*.c32 "${isofs_dir}/syslinux/"
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/lpxelinux.0" "${isofs_dir}/syslinux/"
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/memdisk" "${isofs_dir}/syslinux/"
-
-    _run_once _make_boot_on_iso9660
-
-    if [[ -e "${isofs_dir}/syslinux/hdt.c32" ]]; then
-        install -d -m 0755 -- "${isofs_dir}/syslinux/hdt"
-        if [[ -e "${pacstrap_dir}/usr/share/hwdata/pci.ids" ]]; then
-            gzip -cn9 "${pacstrap_dir}/usr/share/hwdata/pci.ids" > \
-                "${isofs_dir}/syslinux/hdt/pciids.gz"
-        fi
-        find "${pacstrap_dir}/usr/lib/modules" -name 'modules.alias' -print -exec gzip -cn9 '{}' ';' -quit > \
-            "${isofs_dir}/syslinux/hdt/modalias.gz"
-    fi
-
-    # Add other aditional/extra files to ${install_dir}/boot/
-    if [[ -e "${pacstrap_dir}/boot/memtest86+/memtest.bin" ]]; then
-        # rename for PXE: https://wiki.archlinux.org/title/Syslinux#Using_memtest
-        install -m 0644 -- "${pacstrap_dir}/boot/memtest86+/memtest.bin" "${isofs_dir}/${install_dir}/boot/memtest"
-        install -d -m 0755 -- "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
-        install -m 0644 -- "${pacstrap_dir}/usr/share/licenses/common/GPL2/license.txt" \
-            "${isofs_dir}/${install_dir}/boot/licenses/memtest86+/"
-    fi
-    _msg_info "Done! SYSLINUX set up for BIOS booting from a disk successfully."
-}
-
-# Prepare syslinux for El-Torito booting
-_make_bootmode_bios.syslinux.eltorito() {
-    _msg_info "Setting up SYSLINUX for BIOS booting from an optical disc..."
-    install -d -m 0755 -- "${isofs_dir}/syslinux"
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isolinux.bin" "${isofs_dir}/syslinux/"
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/syslinux/bios/isohdpfx.bin" "${isofs_dir}/syslinux/"
-
-    # ISOLINUX and SYSLINUX installation is shared
-    _run_once _make_bootmode_bios.syslinux.mbr
-
-    _msg_info "Done! SYSLINUX set up for BIOS booting from an optical disc successfully."
-}
-
-# Copy kernel and initramfs to FAT image
-_make_boot_on_fat() {
-    local ucode_image all_ucode_images=()
-    _msg_info "Preparing kernel and initramfs for the FAT file system..."
-    mmd -i "${work_dir}/efiboot.img" \
-        "::/${install_dir}" "::/${install_dir}/boot" "::/${install_dir}/boot/${arch}"
-    mcopy -i "${work_dir}/efiboot.img" "${pacstrap_dir}/boot/vmlinuz-"* \
-        "${pacstrap_dir}/boot/initramfs-"*".img" "::/${install_dir}/boot/${arch}/"
-    for ucode_image in "${ucodes[@]}"; do
-        if [[ -e "${pacstrap_dir}/boot/${ucode_image}" ]]; then
-            all_ucode_images+=("${pacstrap_dir}/boot/${ucode_image}")
-        fi
-    done
-    if (( ${#all_ucode_images[@]} )); then
-        mcopy -i "${work_dir}/efiboot.img" "${all_ucode_images[@]}" "::/${install_dir}/boot/"
-    fi
-    _msg_info "Done!"
-}
-
-# Create a FAT image (efiboot.img) which will serve as the EFI system partition
-# $1: image size in bytes
-_make_efibootimg() {
-    local imgsize_kib="0"
-    local imgsize_bytes=${1}
-
-    if (( imgsize_bytes < 2*1024*1024 )); then
-        _msg_info "Validating '${bootmode}': efiboot.img size is ${imgsize_bytes} bytes is less than 2 MiB! Bumping up to 2 MiB"
-        imgsize_bytes=$((2*1024*1024))
-    fi
-
-    # Convert from bytes to KiB and round up to the next full MiB with an additional MiB for reserved sectors.
-    imgsize_kib="$(awk 'function ceil(x){return int(x)+(x>int(x))}
-            function byte_to_kib(x){return x/1024}
-            function mib_to_kib(x){return x*1024}
-            END {print mib_to_kib(ceil((byte_to_kib($1)+1024)/1024))}' <<< "${imgsize_bytes}"
-    )"
-    # The FAT image must be created with mkfs.fat not mformat, as some systems have issues with mformat made images:
-    # https://lists.gnu.org/archive/html/grub-devel/2019-04/msg00099.html
-    rm -f -- "${work_dir}/efiboot.img"
-    _msg_info "Creating FAT image of size: ${imgsize_kib} KiB..."
-    if [[ "${quiet}" == "y" ]]; then
-        # mkfs.fat does not have a -q/--quiet option, so redirect stdout to /dev/null instead
-        # https://github.com/dosfstools/dosfstools/issues/103
-        mkfs.fat -C -n ARCHISO_EFI "${work_dir}/efiboot.img" "${imgsize_kib}" > /dev/null
-    else
-        mkfs.fat -C -n ARCHISO_EFI "${work_dir}/efiboot.img" "${imgsize_kib}"
-    fi
-
-    # Create the default/fallback boot path in which a boot loaders will be placed later.
-    mmd -i "${work_dir}/efiboot.img" ::/EFI ::/EFI/BOOT
-}
-
-# Copy the grub.cfg file in efiboot.img which is used by both UEFI ia32 and UEFI x64.
-_make_efibootimg_grubcfg() {
-    mcopy -i "${work_dir}/efiboot.img" \
-        "${work_dir}/grub.cfg" ::/EFI/BOOT/grub.cfg
-}
-
-_make_bootmode_uefi-ia32.grub.esp() {
-    # Fill Grub configuration files
-    sed "s|%ARCHISO_LABEL%|${iso_label}|g;
-         s|%INSTALL_DIR%|${install_dir}|g;
-         s|%ARCH%|${arch}|g" \
-        "${profile}/grub/grub.cfg" > "${work_dir}/grub.cfg"
-
-    # shellcheck disable=SC2016
-    printf 'configfile ${cmdpath}/grub.cfg\n' > "${work_dir}/grub-embed.cfg"
-
-    # Create EFI file
-    grub-mkstandalone -O i386-efi \
-                      --modules="part_gpt part_msdos fat iso9660" \
-                      --locales="en@quot" \
-                      --themes="" \
-                      -o "${work_dir}/BOOTIA32.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
-    # Add GRUB to the list of files used to calculate the required FAT image size.
-    efiboot_files+=("${work_dir}/BOOTIA32.EFI"
-                    "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi")
-
-    if [[ " ${bootmodes[*]} " =~ uefi-x64.systemd-boot.esp ]]; then
-        # TODO: Remove this branch.
-        _run_once _make_bootmode_uefi-x64.systemd-boot.esp
-    elif [[ " ${bootmodes[*]} " =~ uefi-x64.grub.esp ]]; then
-        _run_once _make_bootmode_uefi-x64.grub.esp
-    else
-        efiboot_imgsize="$(du -bc "${efiboot_files[@]}" \
-            2>/dev/null | awk 'END { print $1 }')"
-        # Create a FAT image for the EFI system partition
-        _make_efibootimg "$efiboot_imgsize"
-    fi
-
-    # Copy grub EFI binary to the default/fallback boot path
-    mcopy -i "${work_dir}/efiboot.img" \
-        "${work_dir}/BOOTIA32.EFI" ::/EFI/BOOT/BOOTIA32.EFI
-
-    # Copy GRUB configuration files
-    _run_once _make_efibootimg_grubcfg
-
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ]]; then
-        mcopy -i "${work_dir}/efiboot.img" \
-            "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ::/shellia32.efi
-    fi
-
-    _msg_info "Done! GRUB set up for UEFI booting successfully."
-}
-
-# Prepare GRUB for El Torito booting
-_make_bootmode_uefi-ia32.grub.eltorito() {
-    # El Torito UEFI boot requires an image containing the EFI system partition.
-    # uefi-ia32.grub.eltorito has the same requirements as uefi-ia32.grub.esp
-    _run_once _make_bootmode_uefi-ia32.grub.esp
-
-    # Additionally set up system-boot in ISO 9660. This allows creating a medium for the live environment by using
-    # manual partitioning and simply copying the ISO 9660 file system contents.
-    # This is not related to El Torito booting and no firmware uses these files.
-    _msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
-    install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
-
-    # Copy GRUB EFI binary to the default/fallback boot path
-    install -m 0644 -- "${work_dir}/BOOTIA32.EFI" \
-        "${isofs_dir}/EFI/BOOT/BOOTIA32.EFI"
-
-    # Copy GRUB configuration files
-    install -m 0644 -- "${work_dir}/grub.cfg" "${isofs_dir}/EFI/BOOT/grub.cfg"
-
-    # edk2-shell based UEFI shell
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" ]]; then
-        install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/ia32/Shell_Full.efi" \
-                           "${isofs_dir}/shellia32.efi"
-    fi
-
-    _msg_info "Done!"
-}
-
-_make_bootmode_uefi-x64.grub.esp() {
-    # Fill Grub configuration files
-    sed "s|%ARCHISO_LABEL%|${iso_label}|g;
-         s|%INSTALL_DIR%|${install_dir}|g;
-         s|%ARCH%|${arch}|g" \
-        "${profile}/grub/grub.cfg" > "${work_dir}/grub.cfg"
-
-    # shellcheck disable=SC2016
-    printf 'configfile ${cmdpath}/grub.cfg\n' > "${work_dir}/grub-embed.cfg"
-
-    # Create EFI file
-    grub-mkstandalone -O x86_64-efi \
-                      --modules="part_gpt part_msdos fat iso9660" \
-                      --locales="en@quot" \
-                      --themes="" \
-                      -o "${work_dir}/BOOTx64.EFI" "boot/grub/grub.cfg=${work_dir}/grub-embed.cfg"
-    # Add GRUB to the list of files used to calculate the required FAT image size.
-    efiboot_files+=("${work_dir}/BOOTx64.EFI"
-                    "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi")
-
-    efiboot_imgsize="$(du -bc "${efiboot_files[@]}" \
-        2>/dev/null | awk 'END { print $1 }')"
-
-    # Create a FAT image for the EFI system partition
-    _make_efibootimg "$efiboot_imgsize"
-
-    # Copy grub EFI binary to the default/fallback boot path
-    mcopy -i "${work_dir}/efiboot.img" \
-        "${work_dir}/BOOTx64.EFI" ::/EFI/BOOT/BOOTx64.EFI
-
-    _run_once _make_efibootimg_grubcfg
-
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
-        mcopy -i "${work_dir}/efiboot.img" \
-            "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
-    fi
-
-    _msg_info "Done! GRUB set up for UEFI booting successfully."
-}
-
-# Prepare GRUB for El Torito booting
-_make_bootmode_uefi-x64.grub.eltorito() {
-    # El Torito UEFI boot requires an image containing the EFI system partition.
-    # uefi-x64.grub.eltorito has the same requirements as uefi-x64.grub.esp
-    _run_once _make_bootmode_uefi-x64.grub.esp
-
-    # Additionally set up system-boot in ISO 9660. This allows creating a medium for the live environment by using
-    # manual partitioning and simply copying the ISO 9660 file system contents.
-    # This is not related to El Torito booting and no firmware uses these files.
-    _msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
-    install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
-
-    # Copy GRUB EFI binary to the default/fallback boot path
-    install -m 0644 -- "${work_dir}/BOOTx64.EFI" \
-        "${isofs_dir}/EFI/BOOT/BOOTx64.EFI"
-
-    # Copy GRUB configuration files
-    #  install -m 0644 -- "${work_dir}/grub.cfg" "${isofs_dir}"
-    # TODO: ${cmdpath} is (cd0)/EFI/BOOT, so we should put grub.cfg here?
-    install -m 0644 -- "${work_dir}/grub.cfg" "${isofs_dir}/EFI/BOOT"
-
-    # edk2-shell based UEFI shell
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
-        install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" "${isofs_dir}/shellx64.efi"
-    fi
-
-    _msg_info "Done!"
-}
-
-# Prepare system-boot for booting when written to a disk (isohybrid)
-_make_bootmode_uefi-x64.systemd-boot.esp() {
-    local _file efiboot_imgsize
-    local _available_ucodes=()
-    _msg_info "Setting up systemd-boot for UEFI booting..."
-
-    for _file in "${ucodes[@]}"; do
-        if [[ -e "${pacstrap_dir}/boot/${_file}" ]]; then
-            _available_ucodes+=("${pacstrap_dir}/boot/${_file}")
-        fi
-    done
-    # Calculate the required FAT image size in bytes
-    efiboot_files+=("${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi"
-                    "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi"
-                    "${profile}/efiboot/"
-                    "${pacstrap_dir}/boot/vmlinuz-"*
-                    "${pacstrap_dir}/boot/initramfs-"*".img"
-                    "${_available_ucodes[@]}")
-    efiboot_imgsize="$(du -bc "${efiboot_files[@]}" \
-        2>/dev/null | awk 'END { print $1 }')"
-    # Create a FAT image for the EFI system partition
-    _make_efibootimg "$efiboot_imgsize"
-
-    # Copy systemd-boot EFI binary to the default/fallback boot path
-    mcopy -i "${work_dir}/efiboot.img" \
-        "${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" ::/EFI/BOOT/BOOTx64.EFI
-
-    # Copy systemd-boot configuration files
-    mmd -i "${work_dir}/efiboot.img" ::/loader ::/loader/entries
-    mcopy -i "${work_dir}/efiboot.img" "${profile}/efiboot/loader/loader.conf" ::/loader/
-    for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
-        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
-             s|%INSTALL_DIR%|${install_dir}|g;
-             s|%ARCH%|${arch}|g" \
-            "${_conf}" | mcopy -i "${work_dir}/efiboot.img" - "::/loader/entries/${_conf##*/}"
-    done
-
-    # shellx64.efi is picked up automatically when on /
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
-        mcopy -i "${work_dir}/efiboot.img" \
-            "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ::/shellx64.efi
-    fi
-
-    # Copy kernel and initramfs to FAT image.
-    # systemd-boot can only access files from the EFI system partition it was launched from.
-    _make_boot_on_fat
-
-    _msg_info "Done! systemd-boot set up for UEFI booting successfully."
-}
-
-# Prepare system-boot for El Torito booting
-_make_bootmode_uefi-x64.systemd-boot.eltorito() {
-    # El Torito UEFI boot requires an image containing the EFI system partition.
-    # uefi-x64.systemd-boot.eltorito has the same requirements as uefi-x64.systemd-boot.esp
-    _run_once _make_bootmode_uefi-x64.systemd-boot.esp
-
-    # Additionally set up system-boot in ISO 9660. This allows creating a medium for the live environment by using
-    # manual partitioning and simply copying the ISO 9660 file system contents.
-    # This is not related to El Torito booting and no firmware uses these files.
-    _msg_info "Preparing an /EFI directory for the ISO 9660 file system..."
-    install -d -m 0755 -- "${isofs_dir}/EFI/BOOT"
-
-    # Copy systemd-boot EFI binary to the default/fallback boot path
-    install -m 0644 -- "${pacstrap_dir}/usr/lib/systemd/boot/efi/systemd-bootx64.efi" \
-        "${isofs_dir}/EFI/BOOT/BOOTx64.EFI"
-
-    # Copy systemd-boot configuration files
-    install -d -m 0755 -- "${isofs_dir}/loader/entries"
-    install -m 0644 -- "${profile}/efiboot/loader/loader.conf" "${isofs_dir}/loader/"
-    for _conf in "${profile}/efiboot/loader/entries/"*".conf"; do
-        sed "s|%ARCHISO_LABEL%|${iso_label}|g;
-             s|%INSTALL_DIR%|${install_dir}|g;
-             s|%ARCH%|${arch}|g" \
-            "${_conf}" > "${isofs_dir}/loader/entries/${_conf##*/}"
-    done
-
-    # edk2-shell based UEFI shell
-    # shellx64.efi is picked up automatically when on /
-    if [[ -e "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" ]]; then
-        install -m 0644 -- "${pacstrap_dir}/usr/share/edk2-shell/x64/Shell_Full.efi" "${isofs_dir}/shellx64.efi"
-    fi
-
-    _msg_info "Done!"
-}
-
-_validate_requirements_bootmode_bios.syslinux.mbr() {
-    # bios.syslinux.mbr requires bios.syslinux.eltorito
-    # shellcheck disable=SC2076
-    if [[ ! " ${bootmodes[*]} " =~ ' bios.syslinux.eltorito ' ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Using 'bios.syslinux.mbr' boot mode without 'bios.syslinux.eltorito' is not supported." 0
-    fi
-
-    # Check if the syslinux package is in the package list
-    # shellcheck disable=SC2076
-    if [[ ! " ${pkg_list[*]} " =~ ' syslinux ' ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': The 'syslinux' package is missing from the package list!" 0
-    fi
-
-    # Check if syslinux configuration files exist
-    if [[ ! -d "${profile}/syslinux" ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': The '${profile}/syslinux' directory is missing!" 0
-    else
-        local cfgfile
-        for cfgfile in "${profile}/syslinux/"*'.cfg'; do
-            if [[ -e "${cfgfile}" ]]; then
-                break
-            else
-                (( validation_error=validation_error+1 ))
-                _msg_error "Validating '${bootmode}': No configuration file found in '${profile}/syslinux/'!" 0
-            fi
-        done
-    fi
-
-    # Check for optional packages
-    # shellcheck disable=SC2076
-    if [[ ! " ${pkg_list[*]} " =~ ' memtest86+ ' ]]; then
-        _msg_info "Validating '${bootmode}': 'memtest86+' is not in the package list. Memmory testing will not be available from syslinux."
-    fi
-}
-
-_validate_requirements_bootmode_bios.syslinux.eltorito() {
-    # bios.syslinux.eltorito has the exact same requirements as bios.syslinux.mbr
-    _validate_requirements_bootmode_bios.syslinux.mbr
-}
-
-_validate_requirements_bootmode_uefi-x64.systemd-boot.esp() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.grub.esp ' ]]; then
-        _msg_error "Validating '${bootmode}': cannot be used with bootmode uefi-x64.grub.esp!" 0
-    fi
-
-    # Check if mkfs.fat is available
-    if ! command -v mkfs.fat &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
-    fi
-
-    # Check if mmd and mcopy are available
-    if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
-    fi
-
-    # Check if systemd-boot configuration files exist
-    if [[ ! -d "${profile}/efiboot/loader/entries" ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': The '${profile}/efiboot/loader/entries' directory is missing!" 0
-    else
-        if [[ ! -e "${profile}/efiboot/loader/loader.conf" ]]; then
-            (( validation_error=validation_error+1 ))
-            _msg_error "Validating '${bootmode}': File '${profile}/efiboot/loader/loader.conf' not found!" 0
-        fi
-        local conffile
-        for conffile in "${profile}/efiboot/loader/entries/"*'.conf'; do
-            if [[ -e "${conffile}" ]]; then
-                break
-            else
-                (( validation_error=validation_error+1 ))
-                _msg_error "Validating '${bootmode}': No configuration file found in '${profile}/efiboot/loader/entries/'!" 0
-            fi
-        done
-    fi
-
-    # Check for optional packages
-    # shellcheck disable=SC2076
-    if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
-        _msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
-    fi
-}
-
-_validate_requirements_bootmode_uefi-x64.systemd-boot.eltorito() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.grub.eltorito ' ]]; then
-        _msg_error "Validating '${bootmode}': cannot be used with bootmode uefi-x64.grub.eltorito!" 0
-    fi
-
-    # uefi-x64.systemd-boot.eltorito has the exact same requirements as uefi-x64.systemd-boot.esp
-    _validate_requirements_bootmode_uefi-x64.systemd-boot.esp
-}
-
-_validate_requirements_bootmode_uefi-ia32.grub.esp() {
-    # Check if GRUB is available
-    if ! command -v grub-mkstandalone &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': grub-install is not available on this host. Install 'grub'!" 0
-    fi
-
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' ]]; then
-        _validate_requirements_bootmode_uefi-x64.systemd-boot.esp
-    elif [[ " ${bootmodes[*]} " =~ ' uefi-x64.grub.esp ' ]]; then
-        _validate_requirements_bootmode_uefi-x64.grub.esp
-    else
-        _msg_error "Validating '${bootmode}': requires one of bootmode uefi-x64.systemd-boot.esp or uefi-x64.grub.esp" 0
-    fi
-}
-
-_validate_requirements_bootmode_uefi-ia32.grub.eltorito() {
-    # uefi-ia32.grub.eltorito has the exact same requirements as uefi-ia32.grub.esp
-    _validate_requirements_bootmode_uefi-ia32.grub.esp
-}
-
-_validate_requirements_bootmode_uefi-x64.grub.esp() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' ]]; then
-        _msg_error "Validating '${bootmode}': cannot be used with bootmode uefi-x64.systemd-boot.esp!" 0
-    fi
-
-    # Check if GRUB is available
-    if ! command -v grub-mkstandalone &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': grub-install is not available on this host. Install 'grub'!" 0
-    fi
-
-        # Check if mkfs.fat is available
-    if ! command -v mkfs.fat &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': mkfs.fat is not available on this host. Install 'dosfstools'!" 0
-    fi
-
-    # Check if mmd and mcopy are available
-    if ! { command -v mmd &> /dev/null && command -v mcopy &> /dev/null; }; then
-        _msg_error "Validating '${bootmode}': mmd and/or mcopy are not available on this host. Install 'mtools'!" 0
-    fi
-
-    # Check if GRUB configuration files exist
-    if [[ ! -d "${profile}/grub" ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${bootmode}': The '${profile}/grub' directory is missing!" 0
-    else
-        if [[ ! -e "${profile}/grub/grub.cfg" ]]; then
-            (( validation_error=validation_error+1 ))
-            _msg_error "Validating '${bootmode}': File '${profile}/grub/grub.cfg' not found!" 0
-        fi
-        local conffile
-        for conffile in "${profile}/grub/"*'.cfg'; do
-            if [[ -e "${conffile}" ]]; then
-                break
-            else
-                (( validation_error=validation_error+1 ))
-                _msg_error "Validating '${bootmode}': No configuration file found in '${profile}/grub/'!" 0
-            fi
-        done
-    fi
-
-    # Check for optional packages
-    # shellcheck disable=SC2076
-    if [[ ! " ${pkg_list[*]} " =~ ' edk2-shell ' ]]; then
-        _msg_info "'edk2-shell' is not in the package list. The ISO will not contain a bootable UEFI shell."
-    fi
-}
-
-_validate_requirements_bootmode_uefi-x64.grub.eltorito() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' ]]; then
-        _msg_error "Validating '${bootmode}': cannot be used with bootmode uefi-x64.systemd-boot.eltorito!" 0
-    fi
-    # uefi-x64.grub.eltorito has the exact same requirements as uefi-x64.grub.esp
-    _validate_requirements_bootmode_uefi-x64.grub.esp
-}
-
-# Build airootfs filesystem image
-_prepare_airootfs_image() {
-    _run_once "_mkairootfs_${airootfs_image_type}"
-    _mkchecksum
-    if [[ -n "${gpg_key}" ]]; then
-        _mksignature
-    fi
-}
-
-# export build artifacts for netboot
-_export_netboot_artifacts() {
-    _msg_info "Exporting netboot artifacts..."
-    install -d -m 0755 "${out_dir}"
-    cp -a -- "${isofs_dir}/${install_dir}/" "${out_dir}/"
-    _msg_info "Done!"
-    du -hs -- "${out_dir}/${install_dir}"
-}
-
-# sign build artifacts for netboot
-_sign_netboot_artifacts() {
-    local _file _dir
-    local _files_to_sign=()
-    _msg_info "Signing netboot artifacts..."
-    _dir="${isofs_dir}/${install_dir}/boot/"
-    for _file in "${ucodes[@]}"; do
-        if [[ -e "${_dir}${_file}" ]]; then
-            _files_to_sign+=("${_dir}${_file}")
-        fi
-    done
-    for _file in "${_files_to_sign[@]}" "${_dir}${arch}/vmlinuz-"* "${_dir}${arch}/initramfs-"*.img; do
-        openssl cms \
-            -sign \
-            -binary \
-            -noattr \
-            -in "${_file}" \
-            -signer "${cert_list[0]}" \
-            -inkey "${cert_list[1]}" \
-            -outform DER \
-            -out "${_file}".ipxe.sig
-    done
-    _msg_info "Done!"
-}
-
-_validate_requirements_airootfs_image_type_squashfs() {
-    if ! command -v mksquashfs &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${airootfs_image_type}': mksquashfs is not available on this host. Install 'squashfs-tools'!" 0
-    fi
-}
-
-_validate_requirements_airootfs_image_type_ext4+squashfs() {
-    if ! { command -v mkfs.ext4 &> /dev/null && command -v tune2fs &> /dev/null; }; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${airootfs_image_type}': mkfs.ext4 and/or tune2fs is not available on this host. Install 'e2fsprogs'!" 0
-    fi
-    _validate_requirements_airootfs_image_type_squashfs
-}
-
-_validate_requirements_airootfs_image_type_erofs() {
-    if ! command -v mkfs.erofs &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating '${airootfs_image_type}': mkfs.erofs is not available on this host. Install 'erofs-utils'!" 0
-    fi
-}
-
-_validate_common_requirements_buildmode_all() {
-    if ! command -v pacman &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': pacman is not available on this host. Install 'pacman'!" 0
-    fi
-    if ! command -v find &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': find is not available on this host. Install 'findutils'!" 0
-    fi
-    if ! command -v gzip &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': gzip is not available on this host. Install 'gzip'!" 0
-    fi
-}
-
-_validate_requirements_buildmode_bootstrap() {
-    local bootstrap_pkg_list_from_file=()
-
-    # Check if packages for the bootstrap image are specified
-    if [[ -e "${bootstrap_packages}" ]]; then
-        mapfile -t bootstrap_pkg_list_from_file < \
-            <(sed '/^[[:blank:]]*#.*/d;s/#.*//;/^[[:blank:]]*$/d' "${bootstrap_packages}")
-        bootstrap_pkg_list+=("${bootstrap_pkg_list_from_file[@]}")
-        if (( ${#bootstrap_pkg_list_from_file[@]} < 1 )); then
-            (( validation_error=validation_error+1 ))
-            _msg_error "No package specified in '${bootstrap_packages}'." 0
-        fi
-    else
-        (( validation_error=validation_error+1 ))
-        _msg_error "Bootstrap packages file '${bootstrap_packages}' does not exist." 0
-    fi
-
-    _validate_common_requirements_buildmode_all
-    if ! command -v bsdtar &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': bsdtar is not available on this host. Install 'libarchive'!" 0
-    fi
-}
-
-_validate_common_requirements_buildmode_iso_netboot() {
-    local bootmode
-    local pkg_list_from_file=()
-
-    # Check if the package list file exists and read packages from it
-    if [[ -e "${packages}" ]]; then
-        mapfile -t pkg_list_from_file < <(sed '/^[[:blank:]]*#.*/d;s/#.*//;/^[[:blank:]]*$/d' "${packages}")
-        pkg_list+=("${pkg_list_from_file[@]}")
-        if (( ${#pkg_list_from_file[@]} < 1 )); then
-            (( validation_error=validation_error+1 ))
-            _msg_error "No package specified in '${packages}'." 0
-        fi
-    else
-        (( validation_error=validation_error+1 ))
-        _msg_error "Packages file '${packages}' does not exist." 0
-    fi
-
-    # Check if the specified airootfs_image_type is supported
-    if typeset -f "_mkairootfs_${airootfs_image_type}" &> /dev/null; then
-        if typeset -f "_validate_requirements_airootfs_image_type_${airootfs_image_type}" &> /dev/null; then
-            "_validate_requirements_airootfs_image_type_${airootfs_image_type}"
-        else
-            _msg_warning "Function '_validate_requirements_airootfs_image_type_${airootfs_image_type}' does not exist. Validating the requirements of '${airootfs_image_type}' airootfs image type will not be possible."
-        fi
-    else
-        (( validation_error=validation_error+1 ))
-        _msg_error "Unsupported image type: '${airootfs_image_type}'" 0
-    fi
-}
-
-_validate_requirements_buildmode_iso() {
-    _validate_common_requirements_buildmode_iso_netboot
-    _validate_common_requirements_buildmode_all
-    # Check if the specified bootmodes are supported
-    if (( ${#bootmodes[@]} < 1 )); then
-        (( validation_error=validation_error+1 ))
-        _msg_error "No boot modes specified in '${profile}/profiledef.sh'." 0
-    fi
-    for bootmode in "${bootmodes[@]}"; do
-        if typeset -f "_make_bootmode_${bootmode}" &> /dev/null; then
-            if typeset -f "_validate_requirements_bootmode_${bootmode}" &> /dev/null; then
-                "_validate_requirements_bootmode_${bootmode}"
-            else
-                _msg_warning "Function '_validate_requirements_bootmode_${bootmode}' does not exist. Validating the requirements of '${bootmode}' boot mode will not be possible."
-            fi
-        else
-            (( validation_error=validation_error+1 ))
-            _msg_error "${bootmode} is not a valid boot mode!" 0
-        fi
-    done
-
-    if ! command -v awk &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': awk is not available on this host. Install 'awk'!" 0
-    fi
-}
-
-_validate_requirements_buildmode_netboot() {
-    local _override_cert_list=()
-
-    if [[ "${sign_netboot_artifacts}" == "y" ]]; then
-        # Check if the certificate files exist
-        for _cert in "${cert_list[@]}"; do
-            if [[ -e "${_cert}" ]]; then
-                _override_cert_list+=("$(realpath -- "${_cert}")")
-            else
-                (( validation_error=validation_error+1 ))
-                _msg_error "File '${_cert}' does not exist." 0
-            fi
-        done
-        cert_list=("${_override_cert_list[@]}")
-        # Check if there are at least two certificate files
-        if (( ${#cert_list[@]} < 2 )); then
-            (( validation_error=validation_error+1 ))
-            _msg_error "Two certificates are required for codesigning, but '${cert_list[*]}' is provided." 0
-        fi
-    fi
-    _validate_common_requirements_buildmode_iso_netboot
-    _validate_common_requirements_buildmode_all
-    if ! command -v openssl &> /dev/null; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "Validating build mode '${_buildmode}': openssl is not available on this host. Install 'openssl'!" 0
-    fi
-}
-
-# SYSLINUX El Torito
-_add_xorrisofs_options_bios.syslinux.eltorito() {
-    xorrisofs_options+=(
-        # El Torito boot image for x86 BIOS
-        '-eltorito-boot' 'syslinux/isolinux.bin'
-        # El Torito boot catalog file
-        '-eltorito-catalog' 'syslinux/boot.cat'
-        # Required options to boot with ISOLINUX
-        '-no-emul-boot' '-boot-load-size' '4' '-boot-info-table'
-    )
-}
-
-# SYSLINUX MBR (isohybrid)
-_add_xorrisofs_options_bios.syslinux.mbr() {
-    xorrisofs_options+=(
-        # SYSLINUX MBR bootstrap code; does not work without "-eltorito-boot syslinux/isolinux.bin"
-        '-isohybrid-mbr' "${isofs_dir}/syslinux/isohdpfx.bin"
-        # When GPT is used, create an additional partition in the MBR (besides 0xEE) for sectors 0–1 (MBR
-        # bootstrap code area) and mark it as bootable
-        # May allow booting on some systems
-        # https://wiki.archlinux.org/title/Partitioning#Tricking_old_BIOS_into_booting_from_GPT
-        '--mbr-force-bootable'
-        # Move the first partition away from the start of the ISO to match the expectations of partition editors
-        # May allow booting on some systems
-        # https://dev.lovelyhq.com/libburnia/libisoburn/src/branch/master/doc/partition_offset.wiki
-        '-partition_offset' '16'
-    )
-}
-
-# GRUB in an attached EFI system partition
-_add_xorrisofs_options_uefi-ia32.grub.esp() {
-    # TODO: how does the bootmodes systemd-boot vs x64.grub affect ${bootmodes[*]} tests in _add_xorrisofs_options_uefi-x64.systemd-boot.esp etc?
-    # shellcheck disable=SC2076
-    if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' && ! " ${bootmodes[*]} " =~ ' uefi-x64.grub.esp ' ]]; then
-        # _add_xorrisofs_options_uefi-x64.systemd-boot.esp
-        _add_xorrisofs_options_uefi-x64.grub.esp
-    fi
-}
-
-# GRUB via El Torito
-_add_xorrisofs_options_uefi-ia32.grub.eltorito() {
-    # shellcheck disable=SC2076
-    if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' && ! " ${bootmodes[*]} " =~ ' uefi-x64.grub.eltorito ' ]]; then
-        # _add_xorrisofs_options_uefi-x64.systemd-boot.eltorito
-        _add_xorrisofs_options_uefi-x64.grub.eltorito
-    fi
-}
-
-# systemd-boot in an attached EFI system partition
-_add_xorrisofs_options_uefi-x64.systemd-boot.esp() {
-    # Move the first partition away from the start of the ISO, otherwise the GPT will not be valid and ISO 9660
-    # partition will not be mountable
-    # shellcheck disable=SC2076
-    [[ " ${xorrisofs_options[*]} " =~ ' -partition_offset ' ]] || xorrisofs_options+=('-partition_offset' '16')
-    # Attach efiboot.img as a second partition and set its partition type to "EFI system partition"
-    xorrisofs_options+=('-append_partition' '2' 'C12A7328-F81F-11D2-BA4B-00A0C93EC93B' "${work_dir}/efiboot.img")
-    # Ensure GPT is used as some systems do not support UEFI booting without it
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' bios.syslinux.mbr ' ]]; then
-        # A valid GPT prevents BIOS booting on some systems, instead use an invalid GPT (without a protective MBR).
-        # The attached partition will have the EFI system partition type code in MBR, but in the invalid GPT it will
-        # have a Microsoft basic partition type code.
-        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.eltorito ' &&  ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
-            # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
-            # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
-            # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
-            if [[ ! " ${xorrisofs_options[*]} " =~ ' -isohybrid-gpt-basdat ' ]]; then
-                xorrisofs_options+=('-isohybrid-gpt-basdat')
-            fi
-        fi
-    else
-        # Use valid GPT if BIOS booting support will not be required
-        xorrisofs_options+=('-appended_part_as_gpt')
-    fi
-}
-
-# systemd-boot via El Torito
-_add_xorrisofs_options_uefi-x64.systemd-boot.eltorito() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.systemd-boot.esp ' || " ${bootmodes[*]} " =~ ' uefi-ia32.grub.esp ' ]]; then
-        # systemd-boot in an attached EFI system partition via El Torito
-        xorrisofs_options+=(
-            # Start a new El Torito boot entry for UEFI
-            '-eltorito-alt-boot'
-            # Set the second partition as the El Torito UEFI boot image
-            '-e' '--interval:appended_partition_2:all::'
-            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
-            '-no-emul-boot'
-        )
-        # A valid GPT prevents BIOS booting on some systems, use an invalid GPT instead.
-        if [[ " ${bootmodes[*]} " =~ ' bios.syslinux.mbr ' ]]; then
-            # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
-            # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
-            # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
-            if [[ ! " ${xorrisofs_options[*]} " =~ ' -isohybrid-gpt-basdat ' ]]; then
-                xorrisofs_options+=('-isohybrid-gpt-basdat')
-            fi
-        fi
-    else
-        # The ISO will not contain a GPT partition table, so to be able to reference efiboot.img, place it as a
-        # file inside the ISO 9660 file system
-        install -d -m 0755 -- "${isofs_dir}/EFI/archiso"
-        cp -a -- "${work_dir}/efiboot.img" "${isofs_dir}/EFI/archiso/efiboot.img"
-        # systemd-boot in an embedded efiboot.img via El Torito
-        xorrisofs_options+=(
-            # Start a new El Torito boot entry for UEFI
-            '-eltorito-alt-boot'
-            # Set efiboot.img as the El Torito UEFI boot image
-            '-e' 'EFI/archiso/efiboot.img'
-            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
-            '-no-emul-boot'
-        )
-    fi
-    # Specify where to save the El Torito boot catalog file in case it is not already set by bios.syslinux.eltorito
-    # shellcheck disable=SC2076
-    [[ " ${bootmodes[*]} " =~ ' bios.' ]] || xorrisofs_options+=('-eltorito-catalog' 'EFI/boot.cat')
-}
-
-# GRUB in an attached EFI system partition.
-# Same as _add_xorrisofs_options_uefi-x64.systemd-boot.esp.
-_add_xorrisofs_options_uefi-x64.grub.esp() {
-    # Move the first partition away from the start of the ISO, otherwise the GPT will not be valid and ISO 9660
-    # partition will not be mountable
-    # shellcheck disable=SC2076
-    [[ " ${xorrisofs_options[*]} " =~ ' -partition_offset ' ]] || xorrisofs_options+=('-partition_offset' '16')
-    # Attach efiboot.img as a second partition and set its partition type to "EFI system partition"
-    xorrisofs_options+=('-append_partition' '2' 'C12A7328-F81F-11D2-BA4B-00A0C93EC93B' "${work_dir}/efiboot.img")
-    # Ensure GPT is used as some systems do not support UEFI booting without it
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' bios.syslinux.mbr ' ]]; then
-        # A valid GPT prevents BIOS booting on some systems, instead use an invalid GPT (without a protective MBR).
-        # The attached partition will have the EFI system partition type code in MBR, but in the invalid GPT it will
-        # have a Microsoft basic partition type code.
-        if [[ ! " ${bootmodes[*]} " =~ ' uefi-x64.grub.eltorito ' &&  ! " ${bootmodes[*]} " =~ ' uefi-ia32.grub.eltorito ' ]]; then
-            # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
-            # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
-            # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
-            if [[ ! " ${xorrisofs_options[*]} " =~ ' -isohybrid-gpt-basdat ' ]]; then
-                xorrisofs_options+=('-isohybrid-gpt-basdat')
-            fi
-        fi
-    else
-        # Use valid GPT if BIOS booting support will not be required
-        xorrisofs_options+=('-appended_part_as_gpt')
-    fi
-}
-
-# GRUB via El Torito
-# Same as _add_xorrisofs_options_uefi-x64.systemd-boot.eltorito.
-_add_xorrisofs_options_uefi-x64.grub.eltorito() {
-    # shellcheck disable=SC2076
-    if [[ " ${bootmodes[*]} " =~ ' uefi-x64.grub.esp ' || " ${bootmodes[*]} " =~ ' uefi-ia32.grub.esp ' ]]; then
-        # grub in an attached EFI system partition via El Torito
-        xorrisofs_options+=(
-            # Start a new El Torito boot entry for UEFI
-            '-eltorito-alt-boot'
-            # Set the second partition as the El Torito UEFI boot image
-            '-e' '--interval:appended_partition_2:all::'
-            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
-            '-no-emul-boot'
-        )
-        # A valid GPT prevents BIOS booting on some systems, use an invalid GPT instead.
-        if [[ " ${bootmodes[*]} " =~ ' bios.syslinux.mbr ' ]]; then
-            # If '-isohybrid-gpt-basdat' is specified before '-e', then the appended EFI system partition will have the
-            # EFI system partition type ID/GUID in both MBR and GPT. If '-isohybrid-gpt-basdat' is specified after '-e',
-            # the appended EFI system partition will have the Microsoft basic data type GUID in GPT.
-            if [[ ! " ${xorrisofs_options[*]} " =~ ' -isohybrid-gpt-basdat ' ]]; then
-                xorrisofs_options+=('-isohybrid-gpt-basdat')
-            fi
-        fi
-    else
-        # The ISO will not contain a GPT partition table, so to be able to reference efiboot.img, place it as a
-        # file inside the ISO 9660 file system
-        install -d -m 0755 -- "${isofs_dir}/EFI/archiso"
-        cp -a -- "${work_dir}/efiboot.img" "${isofs_dir}/EFI/archiso/efiboot.img"
-        # grub in an embedded efiboot.img via El Torito
-        xorrisofs_options+=(
-            # Start a new El Torito boot entry for UEFI
-            '-eltorito-alt-boot'
-            # Set efiboot.img as the El Torito UEFI boot image
-            '-e' 'EFI/archiso/efiboot.img'
-            # Boot image is not emulating floppy or hard disk; required for all known boot loaders
-            '-no-emul-boot'
-        )
-    fi
-    # Specify where to save the El Torito boot catalog file in case it is not already set by bios.syslinux.eltorito
-    # shellcheck disable=SC2076
-    [[ " ${bootmodes[*]} " =~ ' bios.' ]] || xorrisofs_options+=('-eltorito-catalog' 'EFI/boot.cat')
-}
-
-# Build bootstrap image
-_build_bootstrap_image() {
-    local _bootstrap_parent
-    _bootstrap_parent="$(dirname -- "${pacstrap_dir}")"
-
-    [[ -d "${out_dir}" ]] || install -d -- "${out_dir}"
-
-    cd -- "${_bootstrap_parent}"
-
-    _msg_info "Creating bootstrap image..."
-    bsdtar -cf - "root.${arch}" | gzip -cn9 > "${out_dir}/${image_name}"
-    _msg_info "Done!"
-    du -h -- "${out_dir}/${image_name}"
-    cd -- "${OLDPWD}"
-}
-
-# Build ISO
-_build_iso_image() {
-    local xorriso_options=() xorrisofs_options=()
-    local bootmode
-
-    [[ -d "${out_dir}" ]] || install -d -- "${out_dir}"
-
-    if [[ "${quiet}" == "y" ]]; then
-        # The when xorriso is run in mkisofs compatibility mode (xorrisofs), the mkisofs option -quiet is interpreted
-        # too late (e.g. messages about SOURCE_DATE_EPOCH still get shown).
-        # Instead use native xorriso option to silence the output.
-        xorriso_options=('-report_about' 'SORRY' "${xorriso_options[@]}")
-    fi
-
-    # Add required xorrisofs options for each boot mode
-    for bootmode in "${bootmodes[@]}"; do
-        typeset -f "_add_xorrisofs_options_${bootmode}" &> /dev/null && "_add_xorrisofs_options_${bootmode}"
-    done
-
-    rm -f -- "${out_dir}/${image_name}"
-    _msg_info "Creating ISO image..."
-    xorriso "${xorriso_options[@]}" -as mkisofs \
-            -iso-level 3 \
-            -full-iso9660-filenames \
-            -joliet \
-            -joliet-long \
-            -rational-rock \
-            -volid "${iso_label}" \
-            -appid "${iso_application}" \
-            -publisher "${iso_publisher}" \
-            -preparer "prepared by ${app_name}" \
-            "${xorrisofs_options[@]}" \
-            -output "${out_dir}/${image_name}" \
-            "${isofs_dir}/"
-    _msg_info "Done!"
-    du -h -- "${out_dir}/${image_name}"
-}
-
-# Read profile's values from profiledef.sh
-_read_profile() {
-    if [[ -z "${profile}" ]]; then
-        _msg_error "No profile specified!" 1
-    fi
-    if [[ ! -d "${profile}" ]]; then
-        _msg_error "Profile '${profile}' does not exist!" 1
-    elif [[ ! -e "${profile}/profiledef.sh" ]]; then
-        _msg_error "Profile '${profile}' is missing 'profiledef.sh'!" 1
-    else
-        cd -- "${profile}"
-
-        # Source profile's variables
-        # shellcheck source=configs/releng/profiledef.sh
-        . "${profile}/profiledef.sh"
-
-        # Resolve paths of files that are expected to reside in the profile's directory
-        [[ -n "$arch" ]] || arch="$(uname -m)"
-        [[ -n "$packages" ]] || packages="${profile}/packages.${arch}"
-        packages="$(realpath -- "${packages}")"
-        pacman_conf="$(realpath -- "${pacman_conf}")"
-
-        # Resolve paths of files that may reside in the profile's directory
-        if [[ -z "$bootstrap_packages" ]] && [[ -e "${profile}/bootstrap_packages.${arch}" ]]; then
-            bootstrap_packages="${profile}/bootstrap_packages.${arch}"
-            bootstrap_packages="$(realpath -- "${bootstrap_packages}")"
-            pacman_conf="$(realpath -- "${pacman_conf}")"
-        fi
-
-        cd -- "${OLDPWD}"
-    fi
-}
-
-# Validate set options
-_validate_options() {
-    local validation_error=0 _buildmode
-
-    _msg_info "Validating options..."
-
-    # Check if pacman configuration file exists
-    if [[ ! -e "${pacman_conf}" ]]; then
-        (( validation_error=validation_error+1 ))
-        _msg_error "File '${pacman_conf}' does not exist." 0
-    fi
-
-    # Check if the specified buildmodes are supported
-    for _buildmode in "${buildmodes[@]}"; do
-        if typeset -f "_build_buildmode_${_buildmode}" &> /dev/null; then
-            if typeset -f "_validate_requirements_buildmode_${_buildmode}" &> /dev/null; then
-                "_validate_requirements_buildmode_${_buildmode}"
-            else
-                _msg_warning "Function '_validate_requirements_buildmode_${_buildmode}' does not exist. Validating the requirements of '${_buildmode}' build mode will not be possible."
-            fi
-        else
-            (( validation_error=validation_error+1 ))
-            _msg_error "${_buildmode} is not a valid build mode!" 0
-        fi
-    done
-
-    if (( validation_error )); then
-        _msg_error "${validation_error} errors were encountered while validating the profile. Aborting." 1
-    fi
-    _msg_info "Done!"
-}
-
-# Set defaults and, if present, overrides from mkarchiso command line option parameters
-_set_overrides() {
-    # Set variables that have command line overrides
-    [[ ! -v override_buildmodes ]] || buildmodes=("${override_buildmodes[@]}")
-    if (( ${#buildmodes[@]} < 1 )); then
-        buildmodes+=('iso')
-    fi
-    if [[ -v override_work_dir ]]; then
-        work_dir="$override_work_dir"
-    elif [[ -z "$work_dir" ]]; then
-        work_dir='./work'
-    fi
-    work_dir="$(realpath -- "$work_dir")"
-    if [[ -v override_out_dir ]]; then
-        out_dir="$override_out_dir"
-    elif [[ -z "$out_dir" ]]; then
-        out_dir='./out'
-    fi
-    out_dir="$(realpath -- "$out_dir")"
-    if [[ -v override_pacman_conf ]]; then
-        pacman_conf="$override_pacman_conf"
-    elif [[ -z "$pacman_conf" ]]; then
-        pacman_conf="/etc/pacman.conf"
-    fi
-    pacman_conf="$(realpath -- "$pacman_conf")"
-    [[ ! -v override_pkg_list ]] || pkg_list+=("${override_pkg_list[@]}")
-    # TODO: allow overriding bootstrap_pkg_list
-    if [[ -v override_iso_label ]]; then
-        iso_label="$override_iso_label"
-    elif [[ -z "$iso_label" ]]; then
-        iso_label="${app_name^^}"
-    fi
-    if [[ -v override_iso_publisher ]]; then
-        iso_publisher="$override_iso_publisher"
-    elif [[ -z "$iso_publisher" ]]; then
-        iso_publisher="${app_name}"
-    fi
-    if [[ -v override_iso_application ]]; then
-        iso_application="$override_iso_application"
-    elif [[ -z "$iso_application" ]]; then
-        iso_application="${app_name} iso"
-    fi
-    if [[ -v override_install_dir ]]; then
-        install_dir="$override_install_dir"
-    elif [[ -z "$install_dir" ]]; then
-        install_dir="${app_name}"
-    fi
-    [[ ! -v override_gpg_key ]] || gpg_key="$override_gpg_key"
-    [[ ! -v override_gpg_sender ]] || gpg_sender="$override_gpg_sender"
-    if [[ -v override_cert_list ]]; then
-        sign_netboot_artifacts="y"
-    fi
-    [[ ! -v override_cert_list ]] || cert_list+=("${override_cert_list[@]}")
-    if [[ -v override_quiet ]]; then
-        quiet="$override_quiet"
-    elif [[ -z "$quiet" ]]; then
-        quiet="y"
-    fi
-
-    # Set variables that do not have overrides
-    [[ -n "$airootfs_image_type" ]] || airootfs_image_type="squashfs"
-    [[ -n "$iso_name" ]] || iso_name="${app_name}"
-}
-
-_export_gpg_publickey() {
-    rm -f -- "${work_dir}/pubkey.gpg"
-    gpg --batch --no-armor --output "${work_dir}/pubkey.gpg" --export "${gpg_key}"
-}
-
-_make_version() {
-    local _os_release
-
-    _msg_info "Creating version files..."
-    # Write version file to system installation dir
-    rm -f -- "${pacstrap_dir}/version"
-    printf '%s\n' "${iso_version}" > "${pacstrap_dir}/version"
-
-    if [[ "${buildmode}" == @("iso"|"netboot") ]]; then
-        install -d -m 0755 -- "${isofs_dir}/${install_dir}"
-        # Write version file to ISO 9660
-        printf '%s\n' "${iso_version}" > "${isofs_dir}/${install_dir}/version"
-        # Write grubenv with version information to ISO 9660
-        printf '%.1024s' "$(printf '# GRUB Environment Block\nNAME=%s\nVERSION=%s\n%s' \
-            "${iso_name}" "${iso_version}" "$(printf '%0.1s' "#"{1..1024})")" \
-            > "${isofs_dir}/${install_dir}/grubenv"
-    fi
-
-    # Append IMAGE_ID & IMAGE_VERSION to os-release
-    _os_release="$(realpath -- "${pacstrap_dir}/etc/os-release")"
-    if [[ ! -e "${pacstrap_dir}/etc/os-release" && -e "${pacstrap_dir}/usr/lib/os-release" ]]; then
-        _os_release="$(realpath -- "${pacstrap_dir}/usr/lib/os-release")"
-    fi
-    if [[ "${_os_release}" != "${pacstrap_dir}"* ]]; then
-        _msg_warning "os-release file '${_os_release}' is outside of valid path."
-    else
-        [[ ! -e "${_os_release}" ]] || sed -i '/^IMAGE_ID=/d;/^IMAGE_VERSION=/d' "${_os_release}"
-        printf 'IMAGE_ID=%s\nIMAGE_VERSION=%s\n' "${iso_name}" "${iso_version}" >> "${_os_release}"
-    fi
-    _msg_info "Done!"
-}
-
-_make_pkglist() {
-    _msg_info "Creating a list of installed packages on live-enviroment..."
-    case "${buildmode}" in
-        "bootstrap")
-            pacman -Q --sysroot "${pacstrap_dir}" > "${pacstrap_dir}/pkglist.${arch}.txt"
-            ;;
-        "iso"|"netboot")
-            install -d -m 0755 -- "${isofs_dir}/${install_dir}"
-            pacman -Q --sysroot "${pacstrap_dir}" > "${isofs_dir}/${install_dir}/pkglist.${arch}.txt"
-            ;;
-    esac
-    _msg_info "Done!"
-}
-
-# build the base for an ISO and/or a netboot target
-_build_iso_base() {
-    local run_once_mode="base"
-    local buildmode_packages="${packages}"
-    # Set the package list to use
-    local buildmode_pkg_list=("${pkg_list[@]}")
-    # Set up essential directory paths
-    pacstrap_dir="${work_dir}/${arch}/airootfs"
-    isofs_dir="${work_dir}/iso"
-
-    # Create working directory
-    [[ -d "${work_dir}" ]] || install -d -- "${work_dir}"
-    # Write build date to file or if the file exists, read it from there
-    if [[ -e "${work_dir}/build_date" ]]; then
-        SOURCE_DATE_EPOCH="$(<"${work_dir}/build_date")"
-    else
-        printf '%s\n' "$SOURCE_DATE_EPOCH" > "${work_dir}/build_date"
-    fi
-
-    [[ "${quiet}" == "y" ]] || _show_config
-    _run_once _make_pacman_conf
-    [[ -z "${gpg_key}" ]] || _run_once _export_gpg_publickey
-    _run_once _make_custom_airootfs
-    _run_once _make_packages
-    _run_once _make_version
-    _run_once _make_customize_airootfs
-    _run_once _make_pkglist
-    if [[ "${buildmode}" == 'netboot' ]]; then
-        _run_once _make_boot_on_iso9660
-    else
-        _make_bootmodes
-    fi
-    _run_once _cleanup_pacstrap_dir
-    _run_once _prepare_airootfs_image
-}
-
-# Build the bootstrap buildmode
-_build_buildmode_bootstrap() {
-    local image_name="${iso_name}-bootstrap-${iso_version}-${arch}.tar.gz"
-    local run_once_mode="${buildmode}"
-    local buildmode_packages="${bootstrap_packages}"
-    # Set the package list to use
-    local buildmode_pkg_list=("${bootstrap_pkg_list[@]}")
-
-    # Set up essential directory paths
-    pacstrap_dir="${work_dir}/${arch}/bootstrap/root.${arch}"
-    [[ -d "${work_dir}" ]] || install -d -- "${work_dir}"
-    install -d -m 0755 -o 0 -g 0 -- "${pacstrap_dir}"
-
-    [[ "${quiet}" == "y" ]] || _show_config
-    _run_once _make_pacman_conf
-    _run_once _make_packages
-    _run_once _make_version
-    _run_once _make_pkglist
-    _run_once _cleanup_pacstrap_dir
-    _run_once _build_bootstrap_image
-}
-
-# Build the netboot buildmode
-_build_buildmode_netboot() {
-    local run_once_mode="${buildmode}"
-
-    _build_iso_base
-    if [[ -v cert_list ]]; then
-        _run_once _sign_netboot_artifacts
-    fi
-    _run_once _export_netboot_artifacts
-}
-
-# Build the ISO buildmode
-_build_buildmode_iso() {
-    local image_name="${iso_name}-${iso_version}-${arch}.iso"
-    local run_once_mode="${buildmode}"
-    _build_iso_base
-    _run_once _build_iso_image
-}
-
-# build all buildmodes
-_build() {
-    local buildmode
-    local run_once_mode="build"
-
-    for buildmode in "${buildmodes[@]}"; do
-        _run_once "_build_buildmode_${buildmode}"
-    done
-}
-
-while getopts 'c:p:C:L:P:A:D:w:m:o:g:G:vh?' arg; do
-    case "${arg}" in
-        p) read -r -a override_pkg_list <<< "${OPTARG}" ;;
-        C) override_pacman_conf="${OPTARG}" ;;
-        L) override_iso_label="${OPTARG}" ;;
-        P) override_iso_publisher="${OPTARG}" ;;
-        A) override_iso_application="${OPTARG}" ;;
-        D) override_install_dir="${OPTARG}" ;;
-        c) read -r -a override_cert_list <<< "${OPTARG}" ;;
-        w) override_work_dir="${OPTARG}" ;;
-        m) read -r -a override_buildmodes <<< "${OPTARG}" ;;
-        o) override_out_dir="${OPTARG}" ;;
-        g) override_gpg_key="${OPTARG}" ;;
-        G) override_gpg_sender="${OPTARG}" ;;
-        v) override_quiet="n" ;;
-        h|?) _usage 0 ;;
-        *)
-            _msg_error "Invalid argument '${arg}'" 0
-            _usage 1
-            ;;
-    esac
-done
-
-shift $((OPTIND - 1))
-
-if (( $# < 1 )); then
-    _msg_error "No profile specified" 0
-    _usage 1
-fi
-
-if (( EUID != 0 )); then
-    _msg_error "${app_name} must be run as root." 1
-fi
-
-# get the absolute path representation of the first non-option argument
-profile="$(realpath -- "${1}")"
-
-_read_profile
-_set_overrides
-_validate_options
-_build
-
-# vim:ts=4:sw=4:et: