Keystone Build fails silently with Admin Hook with bad import

[Echooff3]

Bug report

Describe the bug

If you use the admin hooks pages option described here and you attempt to import a module that does not exist inside the hook, the build process will fail silently.

To Reproduce

Steps to reproduce the behaviour.

1. Create a new blank Keystone project as described in Getting Started
2. Add the cookieSecret to the config so you can build.
3. In a separate file create your Pages Admin Hook
4. Apply that hook to the Admin UI Config
5. Run yarn build
6. Build process will say it exported to ./dist
7. ./dist folder does not exist

// index.js
const { Keystone } = require('@keystonejs/keystone');
const { GraphQLApp } = require('@keystonejs/app-graphql');
const { AdminUIApp } = require('@keystonejs/app-admin-ui');
const { KnexAdapter: Adapter } = require('@keystonejs/adapter-knex');
const PROJECT_NAME = 'a test';
const adapterConfig = { knexOptions: { connection: 'postgres://localhost/somedb' } };

const keystone = new Keystone({
  adapter: new Adapter(adapterConfig),
  cookieSecret: 'a4d836361ce60d2770bec8de5644920aa4d836361ce60d2770bec8de5644920aa4d836361ce60d2770bec8de5644920a'
});

module.exports = {
  keystone,
  apps: [
    new GraphQLApp(), 
    new AdminUIApp({ 
      name: PROJECT_NAME, 
      enableDefaultRoute: true,
      hooks: require.resolve('./hooks') // <- hooks.js in next code snippet
    })],
};

// hooks.js
import NotARealComp from 'itdoesntmatter' // <- Replace this with anything

export default {
    pages: () => [
        // Custom pages
        {
            label: 'Custom Page',
            path: 'custom-page',
            component: NotARealComp,
        },
    ]
}

Expected behaviour

At minimum the build tool should report an error that the build failed.

System information

OS: Mac or Linux

NPM: 7.5.1

Node: v15.8.0

Yarn: 1.22.10

Additional Info

Possibly related to keystonejs/keystone#4339