Errors accessing Cairo from wx_cairocffi.py with OS X (10.11)

I have installed Cairo using MacPorts according to the guidelines in 
Phoenix:

$ port installed
The following ports are currently installed:
  ...
  cairo @1.14.6_0+quartz (active)
  ...

It gets installed to /opt/local/lib/libcairo.dylib which isn't on the 
search path in cairoccfi.dlopen() but adding

export DYLD_FALLBACK_LIBRARY_PATH=/opt/local/lib

to the fwpy script that runs Python seems to do the trick.

However when I try to use Cairo, for example from demo/Cairo.py I get the 
error

File "/Volumes/IVY_E/GitHub/Phoenix/demo/Cairo.py", line 34, in OnPaint
  self.Render(dc)
File "/Volumes/IVY_E/GitHub/Phoenix/demo/Cairo.py", line 48, in Render
  ctx = wxcairo.ContextFromDC(dc)
File 
"/SoftDev/PyDevSrc7/DpMac_V710/env2.7/lib/python2.7/site-packages/wx/lib/wxcairo/__init__.py", 
line 79, in ContextFromDC
  return _ContextFromDC(dc)
File 
"/SoftDev/PyDevSrc7/DpMac_V710/env2.7/lib/python2.7/site-packages/wx/lib/wxcairo/wx_cairocffi.py", 
line 56, in _ContextFromDC
  surfaceptr = cairo_c.cairo_quartz_surface_create_for_cg_context(

AttributeError: cffi library '/opt/local/lib/libcairo.dylib' has no 
function, constant or global variable named 
'cairo_quartz_surface_create_for_cg_context'

I've tried different variations within MacPorts - even tried using Brew - 
also Python 3.4 but all with the same effect.

Any suggestions please?
-- 
Regards
David Hughes
Forestfield Software

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