Error when using react-scripts with swagger-ui.

When running react-scripts start SwaggerUI displays and imports fine. When running react-scripts build the transpiled js fails with 'Error: Expected the reducer to be a function.'

I'm using swagger-ui 3.14.0 together with: react-scripts 0.7.0, react: ^15.6.2, react-dom ^15.6.2.

package.json:

{
  "name": "dev-portal",
  "version": "0.1.0",
  "private": true,
  "devDependencies": {
    "react-scripts": "0.7.0"
  },
  "dependencies": {
    "flux": "^3.1.3",
    "highlight.js": "^9.12.0",
    "jquery": "3.1.1",
    "react": "^15.6.2",
    "react-copy-to-clipboard": "^5.0.1",
    "react-dom": "15.6.2",
    "react-highlight": "^0.10.0",
    "react-router-dom": "4.1.1",
    "swagger-ui": "3.14.0"
  },
  "scripts": {
    "start": "react-scripts start",
    "build": "react-scripts build",
    "test": "react-scripts test --env=jsdom"
  }
}

Usage of SwaggerUI:

import SwaggerUI from 'swagger-ui'

...
var ui = SwaggerUI({
                  dom_id: '#swagger-ui-container',
                  url: 'http://petstore.swagger.io/v2/swagger.json',
                  spec: api.swagger
              })

              if(this.state.apiKey != '') {
                ui.authActions.authorize({
                    api_key: {
                        name: "api_key",
                        schema: {type: "apiKey", in: "header", name: "x-api-key", description: ""},
                        value: this.state.apiKey}});
              }
...

Start by reproducing the difference between react-scripts start and react-scripts build using the versions in package.json, then inspect the transpiled build output around the reducer error. Review the SwaggerUI initialization shown in the issue and compare its behavior in development and production; done means the production build completes and Swagger UI loads without the reducer error.