[gentoo-user] /usr/portage/distfiles vs /var/cache/distfiles

[Paul B. Henson]

I recently installed a new server, and noticed that it is using 
/var/cache/distfiles rather than /usr/portage/distfiles. looking at the 
documentation, it seems that is the new default, and it says "new 
installations" will use it. I have older servers which are still using 
/usr/portage/distfiles. None of them have DISTDIR configured, so I am 
curious how portage is deciding between "old" and new"? If I wanted to 
migrate my older boxes to the new location without explicitly setting 
DISTDIR on them, what do I need to change?

Thanks…