Merge pull request #211218 from ncfavier/fix-install-mount

# the root with `nixos-enter`.

# Without this the bootloader installation may fail due to options that

# contain paths referenced during evaluation, like initrd.secrets.

if (( EUID == 0 )); then

    mount --rbind --mkdir "$mountPoint" "$mountPoint$mountPoint"

    mount --make-rslave "$mountPoint$mountPoint"

    trap 'umount -R "$mountPoint$mountPoint" && rmdir "$mountPoint$mountPoint"' EXIT

fi

# Switch to the new system configuration.  This will install Grub with

# a menu default pointing at the kernel/initrd/etc of the new