Xcode 9.4 Availability on CircleCI

Build Environment
5

Hi,

What was previously working in 9.3, now fails installing aws-s3 gem

Installing aws-s3 0.6.3
Gem::FilePermissionError: You don't have write permissions for the
/var/folders/gk/lkr9pm5x039fx6d3j9r52rv80000gn/T/bundler20180608-673-3peny1aws-s3-0.6.3/bin
directory.
An error occurred while installing aws-s3 (0.6.3), and Bundler
cannot continue.

Thanks