I found this error in the Gentoo Linux distro when I used the emerge command and return me this text:
The ebuild selected to satisfy
Open the /etc/portage/make.conf uncomment the old USE row and use this:
USE="-* X acl alsa"
The /etc/portage/make.conf file is used to customize the Portage environment on a global level to every package that is emerged.
The USE variable allows the system-wide setting or deactivation of USE flags in a space-separated list.
See more at the official webpage.