➜ atomic-swap-ethereum-env git:(master) ✗ nvm use stable
Now using node v12.13.0 (npm v6.12.0)
➜ atomic-swap-ethereum-env git:(master) ✗ yarn
yarn install v1.22.4
[1/5] 🔍 Validating package.json...
[2/5] 🔍 Resolving packages...
[3/5] 🚚 Fetching packages...
[4/5] 🔗 Linking dependencies...
warning " > chai-bn@0.2.1" has unmet peer dependency "bn.js@^4.11.0".
[5/5] 🔨 Building fresh packages...
[-/4] ⠄ waiting...
[-/4] ⠄ waiting...
[3/4] ⠄ scrypt
warning Error running install script for optional dependency: "/Volumes/Workspace/BWork/cordage/atomic-swap-ethereum-env/node_modules/scrypt: Command failed.