Import Sha256 "mo:sha256/SHA256";

HI
I have a basic question. I want to use mo:sha256 library and tested the import in motoko playground and it works. however, in my server, it complains that the library does not exist. How can I add this library so that I can import it?
import Sha256 “mo:sha256/SHA256”;

I know it should be through vessel or in dfx.json dependencies, but not sure how

I tried setting it in dependencies of vessel.dhall but got this error while deploying:

Ah, found the issue, should also have added it in package-set.dhal

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