minuteware ~ # emerge -pvuDN world > test.upd
[ebuild  N    ~] dev-python/authres-0.401  15 kB
[ebuild     U ~] mail-filter/pypolicyd-spf-1.0::gentoo [0.9::minute] 30 kB

Total: 2 packages (1 upgrade, 1 new), Size of downloads: 45 kB

The following keyword changes are necessary to proceed:
#required by mail-filter/pypolicyd-spf-1.0, required by @selected, required by @world (argument)
=dev-python/authres-0.401 ~x86
minuteware ~ #