## Gentoo Linux: "Package NOT merged due to file collisions" problem and solution

When trying to get the latest sys-libs/timezone-data on a somewhat old system, I got the following error:
`[list of nearly all files the package was about to install] - Package 'sys-libs/timezone-data-2008i' NOT merged due to file - collisions. If necessary, refer to your elog messages for the whole - content of the above message.`

According to equery, it looks like those files were installed by glibc:
`# equery b /usr/share/zoneinfo/CETsys-libs/glibc-2.3.4.20041102-r1 (/usr/share/zoneinfo/CET)`

So I tried
`# COLLISION_IGNORE="/usr/share/zoneinfo" emerge -av timezone-data`
which showed less errors but still gave me:
` - sys-libs/glibc-2.3.4.20041102-r1 -      /usr/bin/tzselect -      /usr/sbin/zdump -      /usr/sbin/zic`

I ended up with
`# COLLISION_IGNORE="/usr" emerge -av timezone-data`
which worked well.

I looked at the ebuilds and saw that newer glibc packages depend on sys-libs/timezone-data, so upgrading glibc should solve the problem too. I've submitted bug 258802 since I didn't find the info anywhere else.