Gentoo: How to update from one portage only? I have an overlay alone with the default portage. Basically, I want to emerge only the updates from the main portage when I run **emerge world -unD** , and emerge the extra packages from the overlay explicitly. But now, each time I run **emerge world** , I got all the packages from both portage. I want to know what is the best way to keep enforce update from one portage only.

You should edit it in files /etc/portage/* In /etc/portage/provided/package.provided you place files which you do not want to be updated or installed e.g. dev-util/android-sdk-update-manager-20.0.3 dev-java/icedtea-bin-7.2.2.1-r1 dev-java/icedtea-bin-6.1.11.3-r

In manuals you will find the rest:

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