[gulshan-fb]

After doing some more investigation, I'm suspecting you're running this on Ubuntu 16.04, and not 14.04. Is this correct?

HHVM doesn't provide a 16.04 package yet in their dl.hhvm.com repo, so what's happening is that the provision script installs the system version of HHVM, which is 3.11. On 14.04, you'll get the correct version which is 3.13.

[STRML]

Thanks - it was indeed on 16.04. Thought I'd try something new while doing fbctf. Will revert to 14.04 and try again.