$subj
eix sys-libs/glibc
[I] sys-libs/glibc
Available versions: (2.2) ~2.9_p20081201-r3^s 2.10.1-r1^s 2.11.3^s ~2.12.1-r3^s 2.12.2^s ~2.13-r2^s 2.13-r4^s ~2.14^s ~2.14.1-r2^s 2.14.1-r3^s ~2.15-r1^s 2.15-r2^s 2.15-r3^s 2.16.0^s ~2.17^s **2.18^s **9999^s
{debug gd hardened multilib nscd profile selinux suid systemtap vanilla CROSSCOMPILE_OPTS="headers-only"}
Installed versions: 2.16.0(2.2)^s(23:12:19 01.12.2013)(gd -debug -hardened -multilib -profile -selinux -suid -systemtap -vanilla CROSSCOMPILE_OPTS="-headers-only")
Homepage: http://www.gnu.org/software/libc/libc.html
Description: GNU libc6 (also called glibc2) C library
-----------------------------------------------------------------------
emerge sys-libs/nss-db
[ebuild N ~] sys-libs/nss-db-2.2.3_pre1-r4 USE="nls"
[blocks B ] >=sys-libs/glibc-2.15 (">=sys-libs/glibc-2.15" is blocking sys-libs/nss-db-2.2.3_pre1-r4)
[blocks B ] sys-libs/nss-db ("sys-libs/nss-db" is blocking sys-libs/glibc-2.16.0)
* Error: The above package list contains packages which cannot be
* installed at the same time on the same system.
(sys-libs/nss-db-2.2.3_pre1-r4::gentoo, ebuild scheduled for merge) pulled in by
sys-libs/nss-db
