There are no versions of lib-compat available for amd64 arch however Mozilla-firefox-bin-1.5.0.7 is marked as stable. jmalinosky-dtlx ~ # emerge -av mozilla-firefox-bin These are the packages that would be merged, in order: Calculating dependencies | !!! All ebuilds that could satisfy ">=sys-libs/lib-compat-1.0-r2" have been masked. !!! One of the following masked packages is required to complete your request: - sys-libs/lib-compat-1.4 (masked by: missing keyword) - sys-libs/lib-compat-1.4.1 (masked by: missing keyword) For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. (dependency required by "www-client/mozilla-firefox-bin-1.5.0.7" [ebuild]) jmalinosky-dtlx ~ # emerge --info Portage 2.1.1-r1 (default-linux/amd64/2006.0, gcc-3.4.6, glibc-2.4-r3, 2.6.17-gentoo-r8 x86_64) ================================================================= System uname: 2.6.17-gentoo-r8 x86_64 Intel(R) Pentium(R) 4 CPU 3.20GHz Gentoo Base System version 1.12.5 Last Sync: Sun, 08 Oct 2006 19:30:01 +0000 ccache version 2.3 [enabled] app-admin/eselect-compiler: [Not Present] dev-java/java-config: 1.2.11-r1 dev-lang/python: 2.4.3-r4 dev-python/pycrypto: 2.0.1-r5 dev-util/ccache: 2.3 dev-util/confcache: [Not Present] sys-apps/sandbox: 1.2.17 sys-devel/autoconf: 2.13, 2.59-r7 sys-devel/automake: 1.4_p6, 1.5, 1.6.3, 1.7.9-r1, 1.8.5-r3, 1.9.6-r2 sys-devel/binutils: 2.16.1-r3 sys-devel/gcc-config: 1.3.13-r4 sys-devel/libtool: 1.5.22 virtual/os-headers: 2.6.11-r2 ACCEPT_KEYWORDS="amd64" AUTOCLEAN="yes" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=nocona -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/kde/3.5/env /usr/kde/3.5/share/config /usr/kde/3.5/shutdown /usr/share/X11/xkb /usr/share/config" CONFIG_PROTECT_MASK="/etc/env.d /etc/gconf /etc/revdep-rebuild /etc/terminfo" CXXFLAGS="-march=nocona -O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="autoconfig ccache distlocks metadata-transfer sandbox sfperms strict userpriv usersandbox" GENTOO_MIRRORS="http://gentoo.chem.wisc.edu/gentoo http://gentoo.osuosl.org http://www.ibiblio.org/pub/Linux/distributions/gentoo" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --delete-after --stats --timeout=180 --exclude='/distfiles' --exclude='/local' --exclude='/packages'" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="/usr/local/portage" SYNC="rsync://rsync.gentoo.org/gentoo-portage" USE="amd64 / X a52 aac aalib acl acpi alsa arts artworkextra asf automount avi bash-completion berkdb bitmap-fonts bonobo browserplugin bzip2 cddb cdparanoia cdr cli crypt cups dbus dga dio directfb divx4linux dmi dri dv dvb dvd dvdr dvdread elibc_glibc emboss encode ethereal exscalibar fbcon ffmpeg firefox flac fontconfig foomaticdb fortran fping gd gif gnustep gnutls gphoto2 gpm gs gstreamer gtkhtml guile hal howl ieee1394 ifp imagemagick imap imlib input_devices_keyboard input_devices_mouse ipod isdnlog javascript jikes jpeg kde kerberos kernel_linux kqemu ldap lm_sensors logrotate lzw lzw-tiff mad mbox mjpeg mng motif mp3 mp4 mpeg mplayer musicbrainz nautilus ncurses network nls nptl nptlonly nsplugin odbc offensive openexr opengl oss pam pcmcia pcre pda perl png pppd python qt qt3 qt4 quicktime rar rdesktop readline reflection samba sasl sdl sensord session slp snmp spell spl ssl subtitles svg swat syslog tcltk tcpd theora threads tiff toolbar transcode truetype truetype-fonts type1-fonts unicode usb userland_GNU v4l v4l2 vcd video_cards_fglrx video_cards_vesa videos visualization vorbis wifi winbind wmf x264 x86 xine xinerama xml xml2 xmlrpc xmms xorg xosd xpm xscreensaver xsl xv xvid xvmc zeroconf zlib" Unset: CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LDFLAGS, LINGUAS, PORTAGE_RSYNC_EXTRA_OPTS
So remove x86 from your use flags!
