Troubleshooting Error "/usr/share/yarn/lib/cli.js:45726" with yarn

While trying to install yarn, you might encounter a SyntaxError: Unexpected token issue referring to /usr/local/lib/node_modules/yarn/lib/cli.js:45726.

According to the related GitHub issue, the problem occurs when your environment meets both the below conditions:

1. yarn version is v1.13.0
2. Node.js is lower than v6

Solution

• Upgrade the version of Node.js

• Upgrade the version of yarn

You should no longer see the issue when building.