nx executor

tsc.js

const { exec } = require('child_process');
const { promisify } = require('util');
const path = require('path');

module.exports.default = async function tsc(options, context) {
  process.chdir(
    path.join(context.cwd, context.workspace.projects[context.projectName].root)
  );

  try {
    const { stdout, stderr } = await promisify(exec)(`tsc -b`);

    console.log(stdout);
    console.error(stderr);

    return { success: stderr === '' };
  } catch (e) {
    console.error(e.stdout);
  }

  return { success: false };
};

Nice!
context.cwd could be replaced with contrext.root.
cwd is for your current directory, while root is for project root.
I got stuck with it once and now promoting all around 😄