Comment 14 for bug 1781015

@Simon,

Before it stopped at 78%, but with this config file, it reached 82%, so '-m' made a difference.

---Boost.Python error in job "bootloader".
Command 'grub-install --target=x86_64-efi --efi-directory=/boot/efi --bootloader-id=lubuntu --force' returned non-zero exit status 1.
grub-install: error: /usr/lib/grub/x86_64-efi/modinfo.sh doesn't exist. Please specify --target or --directory.

Traceback:
File "/usr/lib/x86_64-linux-gnu/calamares/modules/bootloader/main.py", line 420, in run
    prepare_bootloader(fw_type)

  File "/usr/lib/x86_64-linux-gnu/calamares/modules/bootloader/main.py", line 387, in prepare_bootloader
    install_grub(efi_directory, fw_type)

  File "/usr/lib/x86_64-linux-gnu/calamares/modules/bootloader/main.py", line 261, in install_grub
    "--force"])

  File "<string>", line 4, in <module>
---