aurelia-configuration: Getting a 404 loading aurelia-configuration@1.0.7.js

Hello. I’m getting a 404 from aurelia-configuration on a fresh install:

http://localhost:9000/jspm_packages/github/vheissu/aurelia-configuration@1.0.7.js -> 404

My config file is at /config/config.json which should be the default.

My main.js is as follows:

export function configure(aurelia) {
  aurelia.use
    .standardConfiguration()
    .developmentLogging()
    .plugin('aurelia-configuration', config => {
      config.setCascadeMode(false);
      config.setEnvironments({
        development: ['localhost', '192.168.*.*'],
        production: ['brandonftaylor.com', 'www.brandonftaylor.com']
      });
    })
    .plugin('aurelia-validation');

The stack trace from Chrome Developer Tools:

system.js:4 Uncaught (in promise) Error: XHR error (404 Not Found) loading http://localhost:9000/jspm_packages/github/vheissu/aurelia-configuration@1.0.7.js
    Error loading http://localhost:9000/jspm_packages/github/vheissu/aurelia-configuration@1.0.7.js
    at o (http://localhost:9000/jspm_packages/system.js:4:12694)
    at XMLHttpRequest.s.onreadystatechange (http://localhost:9000/jspm_packages/system.js:4:13219)t @ system.src.js:4597g @ system.src.js:4597(anonymous function) @ system.src.js:4597

Thoughts?