After emerging anything, portage reports that x11-drivers/nvidia-drivers-349.16 needs to be rebuild by @preserved-rebuild. After running `emerge @preserved-rebuild` it reports that x11-drivers/nvidia-drivers-349.16. After running `emerge @preserved-rebuild` it reports that x11-drivers/nvidia-drivers-349.16. I suspect this is something to do with the switch to abi_* USE flags. I allowed autounmask-write to write a bunch of abi_* flags to my package.use -- there is what it wrote: > grep abi_ /etc/portage/package.use x11-proto/xextproto abi_x86_32 x11-libs/libX11 abi_x86_32 x11-proto/xcb-proto abi_x86_32 python_targets_python3_4 dev-libs/libpthread-stubs abi_x86_32 x11-libs/libXau abi_x86_32 x11-proto/xproto abi_x86_32 x11-proto/inputproto abi_x86_32 x11-proto/xf86bigfontproto abi_x86_32 x11-proto/kbproto abi_x86_32 x11-libs/libXext abi_x86_32 x11-libs/libXdmcp abi_x86_32 x11-libs/libxcb abi_x86_32 Reproducible: Always Steps to Reproduce: 1. merge something -> emerge --info Portage 2.2.14 (python 2.7.9-final-0, default/linux/amd64/13.0/desktop/gnome/systemd, gcc-4.8.4, glibc-2.20-r2, 3.18.11-gentoo x86_64) ================================================================= System uname: Linux-3.18.11-gentoo-x86_64-Intel-R-_Core-TM-_i7_CPU_950_@_3.07GHz-with-gentoo-2.2 KiB Mem: 12301264 total, 3726948 free KiB Swap: 15999996 total, 15998344 free Timestamp of tree: Fri, 17 Apr 2015 09:15:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 app-shells/bash: 4.2_p53 dev-java/java-config: 2.2.0 dev-lang/perl: 5.20.2 dev-lang/python: 2.7.9-r1, 3.3.5-r1, 3.4.1 dev-util/cmake: 2.8.12.2-r1 dev-util/pkgconfig: 0.28-r2 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.13.11 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.11.6-r1, 1.13.4 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.8.4 sys-devel/gcc-config: 1.7.3 sys-devel/libtool: 2.4.6 sys-devel/make: 4.1-r1 sys-kernel/linux-headers: 3.18 (virtual/os-headers) sys-libs/glibc: 2.20-r2 Repositories: gentoo grub2-themes jtriley drdim johu qt furikake mozilla OverlayHead2000 Installed sets: @qt4, @qt5-essentials, @qt5-tools ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=native -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/gnupg/qualified.txt" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c" CXXFLAGS="-march=native -O2 -pipe" DISTDIR="/usr/portage/distfiles" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news nostrip parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync" FFLAGS="-O2 -pipe" GENTOO_MIRRORS="rsync://mirror.bytemark.co.uk/gentoo/ ftp://ftp.mirrorservice.org/sites/distfiles.gentoo.org/" LANG="en_GB.utf8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j9" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-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="/var/lib/layman/grub2-themes /var/lib/layman/jtriley /var/lib/layman/drdim /var/lib/layman/johu /var/lib/layman/qt /var/lib/layman/furikake /var/lib/layman/mozilla /usr/local/portage" SYNC="rsync://rsync.uk.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa amd64 berkdb bluetooth branding bzip2 cairo cdda cdr cli colord cracklib crypt cups cxx dbus dri dts dvd dvdr eds emboss encode evo exif fam firefox flac fortran gdbm gdm gif glamor gmp gnome gnome-keyring gnome-online-accounts gpm gstreamer gtk gtk3 iconv icu introspection ipv6 jpeg lcms ldap libav libkms libnotify libsecret mad mmx mmxext mng modules mp3 mp4 mpeg multilib mysql nautilus ncurses nls nptl nvidia ogg opencl opengl openmp openvg pam pango pcre pdf pgo plymouth png policykit ppds pulseaudio qt3support qt4 readline sdl session socialweb spell sse sse2 sse3 sse4_1 ssl ssse3 startup-notification svg symlink systemd tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xcb xml xv xvid xvmc zlib" ABI_X86="64" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd 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 author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" DRACUT_MODULES="plymouth nvidia" 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 ublox ubx" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en_GB" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" USERLAND="GNU" VIDEO_CARDS="nvidia" 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, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
