sahos ~ # emerge -DuvaN system

These are the packages that would be merged, in order:

Calculating system dependencies... done!
[ebuild   R   ] sys-apps/tcp-wrappers-7.6-r8  USE="-ipv6*" 113 kB
[ebuild     U ] app-arch/bzip2-1.0.4-r1 [1.0.4] USE="-static" 822 kB
[ebuild     U ] app-arch/cpio-2.9 [2.7-r2] USE="nls" 741 kB
[ebuild  N    ] sys-apps/hdparm-7.7  62 kB
[ebuild     U ] sys-apps/sysvinit-2.86-r9 [2.86-r8] USE="(-ibm) (-selinux) -static" 101 kB
[ebuild   R   ] net-misc/iputils-20070202  USE="-doc -ipv6* -static" 87 kB
[ebuild     U ] sys-apps/less-409 [394] USE="unicode" 481 kB
[ebuild     UD] sys-fs/e2fsprogs-1.40.2 [1.40.2-r10] USE="nls -static" 3,873 kB
[ebuild     U ] app-editors/nano-2.0.6 [2.0.4] USE="ncurses nls unicode -debug -justify -minimal -slang -spell*" 1,285 kB
[ebuild     U ] sys-apps/kbd-1.13-r1 [1.12-r8] USE="nls" 652 kB
[ebuild     U ] sys-devel/flex-2.5.33-r3 [2.5.33-r2] USE="nls -static" 680 kB
[ebuild     U ] sys-apps/gawk-3.1.5-r5 [3.1.5-r3] USE="nls" 2,257 kB
[ebuild     U ] app-arch/tar-1.19 [1.16.1] USE="nls -static" 1,839 kB
[ebuild     U ] sys-apps/util-linux-2.13-r2 [2.12r-r6] USE="crypt nls -old-linux% (-selinux) (-old-crypt%) (-perl%*) (-static%)" 2,679 kB
[ebuild  N    ] virtual/editor-0  0 kB
[ebuild     U ] sys-libs/cracklib-2.8.12 [2.8.10] USE="nls python" 573 kB
[ebuild   R   ] net-misc/wget-1.10.2  USE="nls ssl -build -debug -ipv6* -socks5 -static" 1,190 kB
[ebuild     U ] sys-libs/pam-0.99.9.0 [0.99.7.1] USE="cracklib%* nls -audit% (-selinux) -vim-syntax" 888 kB
[ebuild     U ] x11-libs/xtrans-1.0.4 [1.0.3] USE="-debug" 102 kB
[ebuild     U ] x11-proto/inputproto-1.4.2.1 [1.4.1] USE="-debug" 47 kB
[ebuild     U ] sys-process/psmisc-22.5-r2 [22.5] USE="X nls -ipv6* (-selinux)" 271 kB
[ebuild     U ] x11-libs/libX11-1.1.3 [1.1.1-r1] USE="-debug -ipv6* -xcb" 1,492 kB
[ebuild     U ] sys-apps/shadow-4.0.18.1-r1 [4.0.18.1] USE="cracklib nls pam -nousuid (-selinux) -skey" 1,481 kB
[ebuild     U ] x11-libs/libICE-1.0.4 [1.0.3] USE="-debug -ipv6*" 247 kB
[ebuild     U ] sys-apps/busybox-1.7.2 [1.5.0] USE="pam%* -debug -make-symlinks -savedconfig (-selinux) -static" 1,689 kB
[ebuild     U ] x11-libs/libSM-1.0.3 [1.0.2] USE="-debug -ipv6*" 219 kB
[ebuild   R   ] x11-libs/libXmu-1.0.3  USE="-debug -ipv6*" 290 kB
[ebuild   R   ] x11-apps/xauth-1.0.2  USE="-debug -ipv6*" 108 kB
[ebuild     U ] net-misc/openssh-4.7_p1-r2 [4.6_p1-r1] USE="X kerberos pam tcpd -X509 -chroot -hpn -ldap -libedit (-selinux) -skey -smartcard -static" 968 kB
[ebuild     U ] sys-apps/debianutils-2.25 [2.17.5] USE="-static" 133 kB
[ebuild     U ] sys-apps/baselayout-1.12.10-r5 [1.12.10-r3] USE="unicode -bootstrap -build -static" 214 kB
[ebuild     U ] sys-apps/module-init-tools-3.4 [3.2.2-r3] USE="-old-linux% (-no-old-linux%)" 195 kB
[ebuild     U ] sys-fs/udev-116-r1 [109-r1] USE="(-selinux)" 195 kB
[ebuild     U ] sys-libs/glibc-2.6.1 [2.5-r1] USE="nls -debug -glibc-compat20 -glibc-omitfp (-hardened) (-multilib) -profile (-selinux) (-build%) (-nptl%*) (-nptlonly%*)" 0 kB
[blocks B     ] >=sys-apps/util-linux-2.13_pre (is blocking sys-process/schedutils-1.5.0)
[blocks B     ] <sys-fs/device-mapper-1.02.19-r1 (is blocking sys-fs/udev-116-r1)
[blocks B     ] <sys-apps/baselayout-2.0.0_rc (is blocking sys-apps/makedev-3.23.1)
[blocks B     ] sys-process/schedutils (is blocking sys-apps/util-linux-2.13-r2)

Total: 34 packages (26 upgrades, 1 downgrade, 2 new, 5 reinstalls, 4 blocks), Size of downloads: 25,961 kB

!!! Error: The above package list contains packages which cannot be installed
!!!        at the same time on the same system.

For more information about Blocked Packages, please refer to the following
section of the Gentoo Linux x86 Handbook (architecture is irrelevant):

http://www.gentoo.org/doc/en/handbook/handbook-x86.xml?full=1#blocked

sahos ~ #