Every Ubuntu update breaks rEFInd on my MBP

Every time when I'm updating Ubuntu with:

apt-get update && apt-get -y upgrade

I've needed to do this in MBP recovery mode:

mkdir /Volumes/EFI
mount -t msdos /dev/disk0s1 /Volumes/EFI
bless --mount /Volumes/EFI --setBoot --file /Volumes/EFI/EFI/refind/refind_x64.efi --shortform

How can I avoid this?


Finally I found a solution:

umount /boot/efi

I'm running this automatically at Ubuntu startup. When EFI partition needed with running Ubuntu I can mount it manually. Now I don't need to "rebless" rEFInd after every Ubuntu upgrade.