Python 3.6 can find cairo libs but not Python 2.7

[D'Arcy Cain]

$ python2.7 -c "import ctypes.util;
print(ctypes.util.find_library('cairo'))"
libcairo.so.2
$ python3.6 -c "import ctypes.util;
print(ctypes.util.find_library('cairo'))"
None

I have the 3.6 version of py-cairo installed.  Any thoughts?

NetBSD 7.1.2

Cheers.

-- 
D'Arcy J.M. Cain
System Administrator, Vex.Net
http://www.Vex.Net/ IM:darcy at Vex.Net
VoIP: sip:darcy at Vex.Net