Symlinks workaround with wml

rn-cli.config.js

const { execSync, spawn } = require('child_process');

if (process.argv.indexOf('start') > -1) {
  console.log('Setting up wml');
  const wmlBin = path.join(__dirname, 'node_modules/.bin/wml');
  try {
    console.log(execSync(`${wmlBin} rm all`).toString());
    console.log(
      execSync(
        `${wmlBin} add ${__dirname}/../module ${__dirname}/node_modules/module --skip-prompt=true`
      ).toString()
    );
    console.log(execSync(`watchman watch ${__dirname}/../module`).toString());
    const wml = spawn(wmlBin, ['start']);
    wml.stdout.on('data', data => {
      console.log(`${data}`);
    });

    wml.stderr.on('data', data => {
      console.error(`${data}`);
    });
  } catch (e) {
    console.error(e);
  }
}

module.exports = {}

You need a patched version of wml https://github.com/mlabrum/wml#patch-1