First, you need Clevis installed: https://github.com/austintgriffith/clevis
git clone https://github.com/austintgriffith/ecrecover
cd ecrecover
clevis init
(after bringing up RPC endpoint like 'ganache-cli' or 'geth' and configuring clevis.json)
clevis compile Recover
clevis deploy Recover 0
clevis test publish
OR just:
clevis test full
clevis start