Error on running polymer build: only one instance of babel-polyfill is allowed

[doctor-g]

Description

When running polymer build, the following stack trace is produced:

error:   Uncaught exception: Error: only one instance of babel-polyfill is allowed
error:   Error: only one instance of babel-polyfill is allowed
    at Object.<anonymous> (/usr/lib/node_modules/polymer-cli/node_modules/babel-polyfill/lib/index.js:12:9)
    at Module._compile (module.js:541:32)
    at Object.Module._extensions..js (module.js:550:10)
    at Module.load (module.js:458:32)
    at tryModuleLoad (module.js:417:12)
    at Function.Module._load (module.js:409:3)
    at Module.require (module.js:468:17)
    at require (internal/module.js:20:19)
    at Object.<anonymous> (/usr/lib/node_modules/polymer-cli/node_modules/hydrolysis/index.js:12:1)
    at Module._compile (module.js:541:32)

This happens with a vanilla app generated from polymer init as well as with my own app based on the shell.

Versions & Environment

• Polymer CLI: 0.11.1
• node: 6.2.1
• Operating System: Linux Mint 17 (64-bit)

Steps to Reproduce

1. polymer init (choose application, use defaults)
2. polymer build

Expected Results

Expected it to build the application rather than throwing an error.

Actual Results

Error thrown, with stack trace as shown above.

Notes

The symptoms are similar to those referenced in #33.

[doctor-g]

I was able to resolve this issue by switching to node 4.4.5, uninstalling polymer-cli, and reinstalling polymer-cli.