ReaR fails with "ERROR: Failed to make bootable EFI image of GRUB2 (error during grub2-mkstandalone ...)" message

Solution Verified - Updated -

Issue

  • When creating the Rescue ISO on a UEFI system, rear mkrescue (or rear mkbackup) fails with the following error message

    ERROR: Failed to make bootable EFI image of GRUB2 (error during grub2-mkstandalone of ...)
  [...]
  grub2-mkstandalone: error: /usr/lib/grub/x86_64-efi/modinfo.sh doesn't exist. Please specify --target or --directory.

Environment

  • Red Hat Enterprise Linux 7 and later
    • rear
    • UEFI

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