Can't disable concurrency

[joshco]

I followed the instructions here
https://github.com/codegram/futuroscope#disabling-concurrency

But when I try

Futuroscope.default_pool = Futuroscope::Pools::NoPool.new
I get this error:
NameError: uninitialized constant Futuroscope::Pools

I tried to require futuroscope in the context, but can't figure out what file to include.

[joshco]

anybody alive?