Unable to run yarn build

[piedup]

Tried on both master and seadrop-1.0. I get the same error:

Error HH404: File lib/ERC721A/contracts/ERC721A.sol, imported from src/ERC721ContractMetadata.sol, not found.

[Ryan]

You have to pull the submodules. The simplest way is by using the --recurse-submodules flag as stated in the README:

git clone --recurse-submodules https://github.com/ProjectOpenSea/seadrop && cd seadrop

Otherwise you can also use git submodule init && git submodule update after the fact

[piedup]

Thank you!