Git pkgsrc - setting file locations

[Bob Bernstein]

I have been working awhile now with the GIT pkgsrc, and it 
occurs to me that it might be an advantage to provide different 
locations for things such as distfiles, packages, and...what 
else?

What is suggested, and where/how is the optimum method for 
altering these values?

Thank you

--
 A test of right and wrong must be the means, one would
 think, of ascertaining what is right or wrong, and not a
 consequence of having already ascertained it.

                                  J. S. Mill