Unstable constraints: dostools grub-efi and sfdisk are said to be missing.

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It's newbie here. I cannot find information how I fix this ERROR: unstable constraints:

   sfdisk(missing):required by world[sfdisk]

Booting from usb and it is in the setup-alpine process. I am trying to erase the current OS and replace with Alpine now. This error occurs after entering 'sys' before finishing by 'y'.