import { readJson, writeJson } from 'fs-extra'; const libPackage = './libs/ng2-file-upload/package.json'; const mainPackage = './package.json'; (async () => { const version = await readJson(mainPackage).then(json => json.version); const packageJson = await readJson(libPackage); if (packageJson.version) { packageJson.version = version; } await writeJson(libPackage, packageJson, { spaces: 2 }); })();