The 16.5.0 package released to unpkg currently has the production/profiling variant present for cjs builds but there is no equivalent for umd builds. 

i.e. There is the file https://unpkg.com/react@16.5.0/cjs/react.profiling.min.js but there is no https://unpkg.com/react@16.5.0/umd/react.profiling.min.js

It would be great if a future release had the profiling variant packaged as umd as well.

Also thanks for the awesome framework!
if (header.name.indexOf(CONTENTS_FOLDER + '/') === 0) {
          header.name = header.name.substring(CONTENTS_FOLDER.length + 1);
        }
      },
    },
  };
}
async function prepareNpmPackage(name) {
  await Promise.all([
    asyncCopyTo('LICENSE', `build/node_modules/${name}/LICENSE`),
    asyncCopyTo(
      `packages/${name}/package.json`,
      `build/node_modules/${name}/package.json`
    ),
    asyncCopyTo(
      `packages/${name}/README.md`,
      `build/node_modules/${name}/README.md`
    ),
    asyncCopyTo(`packages/${name}/npm`, `build/node_modules/${name}`),
  ]);
  const tgzName = (await asyncExecuteCommand(
    `npm pack build/node_modules/${name}`
  )).trim();
  await asyncRimRaf(`build/node_modules/${name}`);
  await asyncExtractTar(getTarOptions(tgzName, name));
  unlinkSync(tgzName);
}
async function prepareNpmPackages() {