waf will not find correct python version

I've been trying to build pycairo on my machine, which ships with waf. Upon running ./waf configure, I get the following result:

Checking for program python              : /usr/bin/python 
Checking for python version              : (2, 7, 6, 'final', 0) 
The python version is too old, expecting (3, 1, 0)
(complete log in /Users/USER/Downloads/pycairo-1.10.0/build_directory/config.log)

I have python 3 installed to /usr/local/bin/python3, but I don't know after reading waf's documentation how to override this. I am on OS X Yosemite 10.10.4.

Solution

How about running /usr/local/bin/python3 ./waf configure? This should force waf to use the correct python version.

EDIT: Try the following --

export PYTHON=/usr/local/bin/python3 ./waf configure