fixes this, the --no-nvram bypasses updating efi vars with efibootmgr but this entries don't need to be modified after install and on every grub pkg update.
Modifying this line in /usr/lib/grub/grub-multi-install will allow the grub pkg update to complete succesfully...
The error seems to be caused by the efibootmgr command using mduuid of raid.
Adding --no-nvram to grub-install
grub-install --efi-directory =$mntpoint --target=x86_64-efi --no-nvram
fixes this, the --no-nvram bypasses updating efi vars with efibootmgr but this entries don't need to be modified after install and on every grub pkg update.
Modifying this line in /usr/lib/ grub/grub- multi-install will allow the grub pkg update to complete succesfully...
The error seems to be caused by the efibootmgr command using mduuid of raid.