Removing xrender from cairo's +quartz?

[Ernest Prabhakar]

Hi all,

I'm working on a Portfile for Shoes:

whytheluckystiff

It relies on the Quartz version of Cairo.  However, installing Cairo  
with +atsui +quartz still insists on building xrender, which brings in  
all of X11.

Any Cairo gurus know if that's really necessary? And if not, is there  
a clean way to remove that dependency from within the quartz variant?   
Or, should that be part of a (default) X11 variant?

-- Ernie P.