$ yarn
yarn install v1.3.2
info No lockfile found.
[1/4] 🔍  Resolving packages...
[2/4] 🚚  Fetching packages...
[3/4] 🔗  Linking dependencies...
[4/4] 📃  Building fresh packages...
info Lockfile not saved, no dependencies.
✨  Done in 0.07s.

$ node -v && npm -v
v8.9.4
5.6.0