Errors following Meteor Tutorial

So I am following the Meteor tutorial pretty close to the tee. I am getting the following errors.

Errors prevented startup:

While building for os.osx.x86_64:
local/build/programs/server/node_modules/meteor-promise/promise_server.js:122:14: Unexpected token (122:14)

While computing assigned variables:
local/build/programs/server/node_modules/meteor-promise/promise_server.js: Unexpected token (122:14)

I have no idea how to approach these errors. Should I be editing the core meteor files?

Need a bit more information to help…

What step are you on etc.

And no, you should not be editing the core meteor files