I would like to use the --build option that ships with TypeScript 3+, but there seems to be no way to inject it into the tsc arguments list. I can think of two ways to implement this, either specifically for this argument by adding the following to compiler.js:

if (options.build) {
  nodeArgs.push('--build');
}

or more generally by allowing arbitrary arguments to be passed through:

if (options.args) {
  nodeArgs = nodeArgs.concat(options.args);
}

I'm happy to submit a PR if needed.