Make problems / 3rd-party extension w/ PostgreSQL 9.1 on MacOSX

I'm running into make problems on MacOSX.

While technically solved, I was wondering if there was a better way.

To cut a the long story short (the gory details are @ http://stackoverflow.com/questions/6225510/), I'd like to pass the USE_PGXS=1 PGUSER=postgres variables automatically when running sudo make [command] from the shell.

Might any Mac-user on the list know how to do that?

Thanks in advance!
Denis