The `infrastructure-upgrade` repository. This contains `relayer-registry` contracts, and is intended to upgrade Tornado infrastructure for various functionalities and goals.
`yarn build` has to execute a script to modify a single Uniswap dependency because of a stupid version pragma, if you check it out (in `script/setup.sh`) you will just notice that it goes into the file mentioned and changes the version pragma from 0.7.0 to 0.6.12. That is all of the changes needed.