react-native run-ios failing after recent updates?

This used to work like a charm. Not anymore though:
`react-native run-ios`

returns:
```
Scanning 557 folders for symlinks in /home/michal/WebstormProjects/ReactNativeSampleApp/sampleapp/node_modules (2ms)
Found Xcode project sampleapp.xcodeproj

spawnSync xcrun ENOENT
```