myEnvSpawn() {
    die() {
        [ $# -gt 0 ] && printf -- "%s\n" "$*"
        exit 1
    }
    zedenv create $1
    zedenv mount $1
    systemd-nspawn -q --bind=/root --bind=/home/adam --bind=/usr/portage --bind=/var/tmp/portage --bind=/usr/local/portage --bind=/gentoo/ccache -D /tmp/zedenv-*$1 /bin/bash << EOF > /root/myEnvSpawn.log 2>&1
# update portage
emerge --sync
update_kernel() {
        # emerge new kernel sources, make new symlink
        newver=$(emerge -pv gentoo-sources | grep ebuild | cut -d '-' -f 4 | cut -d ':' -f 1)
        emerge gentoo-sources || die "emerging gentoo-sources failed"
        ln -sf /usr/src/linux-${newver}-gentoo /usr/src/linux || die "symlink create failed"

        # use default kernel options for new kernel version options
        cd /usr/src/linux || die "cd failed"
        make olddefconfig || die "make olddefconfig failed"

        # genkernel do the rest
        genkernel all \
                  --clean \
                  --no-mrproper \
                  --kernel-config=/usr/src/linux/.config \
                  --save-config \
                  --zfs \
                  --bootloader=grub \
                  --callback="emerge @module-rebuild zfs" || die "genkernel all failed"

        # just keep one kernel around
        eclean-kernel -n 1 || die "eclean failed"
        emerge --depclean || echo "depclean failed"
    }
# check for new kernel version and update kernel
[ -n "$(emerge -pv gentoo-sources | grep '\[ebuild.*U.*\]')" ] && update_kernel

# if it makes it this far, update everything and keep going on fails.
emerge -vuDN --with-bdeps=y --keep-going @world

# just incase attr of grub.d files got slammed
chmod -x /etc/grub.d/*
chmod +x /etc/grub.d/{00_header,05_zfs_linux.py}
EOF
    # cleanup work dir from /tmp
    zedenv umount $1
    for emptyd in /tmp/zedenv-*$1 ; do rmdir $emptyd ; done

    # update bootloader with new boot environment added to the list
    grub-mkconfig -o /boot/grub/grub.cfg

    activate_reboot() {
        zedenv activate $1 && reboot
    }
    less /root/myEnvSpawn.log
    read -p "activate new environment and reboot? (Y or N) " -n 1 -r
    [[ $REPLY =~ ^[Yy]$ ]] && activate_reboot
}