I recently moved to monorepo using yarn workspace with an existing react native project. Now, I have one react native project called "timeylo" under "packages/", whose react-native dependencies are not hoisted by yarn.

The error I got when bundling JavaScript: 

```
error: bundling failed: Error: Unable to resolve module `styled-components/native` from `/Users/sunhe/Documents/Projects/issue/issue-repo/packages/timeylo/src/app.tsx`: Module `styled-components/native` does not exist in the Haste module map or in these directories:
  /Users/sunhe/Documents/Projects/issue/issue-repo/node_modules/styled-components

```

I have a repo for replaying the error: <https://github.com/bidiu/issue-repo>

All you need to do is:

* `yarn` at root,
* `cd packages/timeylo`
* `yarn start` to start the bundler
* In another terminal, `yarn react-native run-ios` (or use Xcode).

You should see the error under the bundler session.

More info of `react-native info` if you need :)

```
System:
    OS: macOS Mojave 10.14.6
    CPU: (8) x64 Intel(R) Core(TM) i7-7920HQ CPU @ 3.10GHz
    Memory: 207.65 MB / 16.00 GB
    Shell: 3.2.57 - /bin/bash
  Binaries:
    Node: 10.15.3 - /var/folders/dl/9r8h7nj57ps6h4t4jpwd_1kh0000gn/T/yarn--1581841642552-0.27345581007574116/node
    Yarn: 1.21.1 - /var/folders/dl/9r8h7nj57ps6h4t4jpwd_1kh0000gn/T/yarn--1581841642552-0.27345581007574116/yarn
    npm: 6.10.3 - ~/.nvm/versions/node/v10.15.3/bin/npm
    Watchman: 4.9.0 - /opt/local/bin/watchman
  SDKs:
    iOS SDK:
      Platforms: iOS 13.2, DriverKit 19.0, macOS 10.15, tvOS 13.2, watchOS 6.1
  IDEs:
    Android Studio: 3.5 AI-191.8026.42.35.5791312
    Xcode: 11.3.1/11C504 - /usr/bin/xcodebuild
  npmPackages:
    react: 16.8.6 => 16.8.6 
    react-native: 0.60.5 => 0.60.5 
  npmGlobalPackages:
    react-native-cli: 2.0.1

```

Thank you very much!!