Is it possible to user backpack with multiple entries?

[gen4sp]

I've tried using this configuration, and build seems to work, but dev doesn't.

I've tried backpack dev /src/another/one.js - it runs the script but without transcode.

I've found this solution, but it I thought maybe there is the better way.
What is the most right way to use the backpack with multiple entries?

Thank you!

[gen4sp]

I've ended up with following:

backpack.config.js

const entries = {
  api: './src/index.js',
  service: './src/service.js',
}
module.exports = {
  webpack: (config, options, webpack) => {
    delete config.entry.main;
    config.entry[process.env.BACKPACK_ENTRY] = [
      entries[process.env.BACKPACK_ENTRY],
    ]
    config.output.filename = process.env.BACKPACK_ENTRY+'.js';
    return config
  }
}

package.json scripts

"dev_api": "BACKPACK_ENTRY=api backpack dev",
"dev_service": "BACKPACK_ENTRY=service backpack dev",
"build_api": "BACKPACK_ENTRY=api backpack build",
"build_service": "BACKPACK_ENTRY=service backpack build"