As I am having problems to update my world due bug 423379 I tried to manually run: # emerge -1av media-libs/libpostproc These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild N ] media-libs/libpostproc-0.8.0.20120229 USE="mmx -3dnow -3dnowext (-altivec) -pic -static-libs (-vis)" 64 kB [blocks B ] <media-video/libav-0.8.2-r2 ("<media-video/libav-0.8.2-r2" is blocking media-libs/libpostproc-0.8.0.20120229) [blocks B ] media-libs/libpostproc ("media-libs/libpostproc" is blocking media-video/libav-0.8.2) Total: 1 package (1 new), Size of downloads: 64 kB Conflict: 2 blocks (2 unsatisfied) * Error: The above package list contains packages which cannot be * installed at the same time on the same system. (media-video/libav-0.8.2::gentoo, installed) pulled in by >=media-video/libav-0.8.2[X,encode,-jpeg2k,mp3,sdl,theora,threads,truetype,vaapi,vdpau,x264] required by (virtual/ffmpeg-0.10.2-r1::gentoo, installed) (media-libs/libpostproc-0.8.0.20120229::gentoo, ebuild scheduled for merge) pulled in by media-libs/libpostproc 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 That could be solved simply wanting to update libav (already in stable): # emerge -1av media-libs/libpostproc libav These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild U ] media-video/libav-0.8.3 [0.8.2] USE="3dnow 3dnowext X aac alsa bzip2 encode gpl hardcoded-tables mmx mmxext mp3 pulseaudio qt-faststart sdl ssl ssse3 test theora threads truetype v4l vaapi vdpau vorbis x264 xvid zlib (-altivec) -amr -avx -bindist -cdio -cpudetection -custom-cflags -debug -dirac -doc -faac -frei0r -gsm -ieee1394 -jack -jpeg2k (-neon) -network -openssl -oss -pic -rtmp -schroedinger -speex -static-libs (-vis) -vpx (-iwmmxt%)" 436,818 kB [ebuild N ] media-libs/libpostproc-0.8.0.20120229 USE="mmx -3dnow -3dnowext (-altivec) -pic -static-libs (-vis)" 64 kB Total: 2 packages (1 upgrade, 1 new), Size of downloads: 436,882 kB Would you like to merge these packages? [Yes/No] Thanks Reproducible: Always Portage 2.1.11.3 (default/linux/amd64/10.0/desktop/gnome, gcc-4.5.3, glibc-2.14.1-r3, 3.4.0-gentoo x86_64) ================================================================= System uname: Linux-3.4.0-gentoo-x86_64-Intel-R-_Core-TM-_i5-2410M_CPU_@_2.30GHz-with-gentoo-2.1 Timestamp of tree: Sun, 01 Jul 2012 12:35:01 +0000 ccache version 3.1.7 [enabled] app-shells/bash: 4.2_p20 dev-java/java-config: 2.1.11-r3 dev-lang/python: 2.7.3-r2, 3.2.3 dev-util/ccache: 3.1.7 dev-util/cmake: 2.8.7-r5 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.1-r1 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.13, 2.68 sys-devel/automake: 1.9.6-r3, 1.10.3, 1.11.1 sys-devel/binutils: 2.21.1-r1 sys-devel/gcc: 4.4.6-r1, 4.5.3-r2 sys-devel/gcc-config: 1.6 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r1 sys-kernel/linux-headers: 3.1 (virtual/os-headers) sys-libs/glibc: 2.14.1-r3 Repositories: gentoo bumblebee x11 x-portage ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="*" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe -march=native" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-O2 -pipe -march=native" DISTDIR="/usr/distfiles" EMERGE_DEFAULT_OPTS="--quiet-build=n --autounmask-write" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs ccache config-protect-if-modified distlocks ebuild-locks fixlafiles multilib-strict news parallel-fetch parse-eapi-ebuild-head protect-owned sandbox sfperms sign split-log strict test test-fail-continue unknown-features-warn unmerge-logs unmerge-orphans userfetch" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="http://mirror.ovh.net/gentoo-distfiles/ http://ftp.heanet.ie/pub/gentoo/" LANG="es_ES.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu" LINGUAS="es es_ES en_US" MAKEOPTS="-j5" PKGDIR="/usr/local/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/portage/local/layman/bumblebee /usr/portage/local/layman/x11 /usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 applet bash-completion berkdb bluetooth branding bzip2 cairo cdda cddb cdr cli colord consolekit cracklib crypt cups cvs cxx dbus djvu dri dts dvd dvdr dvi eds emboss enchant encode evo exif fam fat ffmpeg firefox flac fortran fuse gdbm gif gnome gnome-keyring gnome-online-accounts gpm gstreamer gtk gtk3 gtkstyle http iconv jpeg kpathsea latex lcms ldap libnotify libvisual lyx mad mms mmx mmxext mng modules mono monolithic-build mp3 mp4 mpeg mudflap multilib musicbrainz nautilus ncurses network-cron networkmanager nls nptl ntfs ntp numa nvidia ogg opengl openmp optimized-qmake pam pango pch pdf png policykit ppds pppd pulseaudio qt3support readline reiserfs scanner sdl session smp sna socialweb spell sse sse2 sse3 ssl ssse3 startup-notification svg t1lib tcpd test theora threads tiff truetype udev udisks unicode upower usb v4l vaapi vcd vdpau vorbis wifi wxwidgets x264 xcb xml xorg xulrunner xv xvid youtube zlib" ALSA_CARDS="hda-intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan sheets stage tables krita karbon braindump" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ubx" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="es es_ES en_US" PHP_TARGETS="php5-3" PYTHON_TARGETS="python3_2 python2_7" RUBY_TARGETS="ruby18 ruby19" USERLAND="GNU" VIDEO_CARDS="fbdev nvidia vesa intel i915 i965" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account" Unset: CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
*** This bug has been marked as a duplicate of bug 290818 ***