@sander @bhauman is right, you have to override gcc version, have a look here https://twitter.com/functionalcave/status/940982615133310976

In case anyone is interested, http://figwheel.org is registered and points to the github repository. I got sick of finding it when I wanted to read the docs (yes, that is the absolute laziest reason to ever register a domain) - so you can be lazy like me if you want 🙂