Because of file coalition net-misc/netifrc-0.2.2 can't be installed.
I know why because I also have a Gentoo box. There sys-fs/udev-init-scripts-26-r2 is installed before net-misc-netifrc-0.2.2.

This fixes the problem of coalition. In Funtoo there is only sys-fs/udev-init-scripts-26.

This is the error message:

• Messages for package net-misc/netifrc-0.2.2:

• This package will overwrite one or more files that may belong to other
• packages (see list below). You can use a command such as `portageq
• owners / <filename>` to identify the installed package that owns a
• file. If portageq reports that only one package owns a file then do
• NOT file a bug report. A bug report is only useful if it identifies at
• least two or more packages that are known to install the same file(s).
• If a collision occurs and you can not explain where the file came from
• then you should simply ignore the collision since there is not enough
• information to determine if a real problem exists. Please do NOT file
• a bug report at http://bugs.gentoo.org unless you report exactly which
• two packages install the same file(s). Once again, please do NOT file
• a bug report unless you have completely understood the above message.
• Detected file collision(s):
• /lib64/udev/net.sh
• Searching all installed packages for file collisions...
• Press Ctrl-C to Stop
• sys-fs/udev-171-r10:0::gentoo
• /lib64/udev/net.sh
• Package 'net-misc/netifrc-0.2.2' NOT merged due to file collisions. If
• necessary, refer to your elog messages for the whole content of the
• above message.