My most recent
# portmaster -Da revealed a package conflict: py-setuptools was merged with py-distribute.
Affects: users of devel/py-setuptools (i.e you)
Reason: devel/py-setuptools was replaced with devel/py-distribute. py-setuptools port will be removed shortly.
To fix this:
# portmaster -o devel/py-distribute devel/py-setuptools
man 8 portmaster:
-o new port dir in /usr/ports installed port:replace the installed port with a port from a different origin