japronto: CPU hits illegal instruction signal on older hardware

I installed Japronto on OSX via setup.py, and attempted to run the hello world example. The example threw an error when I tried to connect to it via my browser or wrk. The error message was

Worker exited with code -4!

Note: I am using a 2010 Macbook pro with Sierra, and received this error straight from the fresh git clone. The installation ran fine but I received a few warnings about uvloop.