It seems that bind won't build unless caps and dlz flags are set. Reproducible: Always Steps to Reproduce: # emerge -a net-dns/bind Actual Results: !!! Problem resolving dependencies for net-dns/bind from @selected ... done! !!! The ebuild selected to satisfy "net-dns/bind" has unmet requirements. - net-dns/bind-9.8.1_p1::gentoo USE="berkdb (multilib) threads -caps -dlz -doc -geoip -gost -gssapi -idn -ipv6 -ldap -mysql -odbc -pkcs11 -postgres -rpz -sdb-ldap (-selinux) -ssl -urandom -xml" The following REQUIRED_USE flag constraints are unsatisfied: berkdb? ( dlz ) threads? ( caps ) The above constraints are a subset of the following complete expression: postgres? ( dlz ) berkdb? ( dlz ) mysql? ( dlz !threads ) odbc? ( dlz ) ldap? ( dlz ) sdb-ldap? ( dlz ) gost? ( ssl ) threads? ( caps ) (dependency required by "@selected" [set]) (dependency required by "@world" [argument]) Expected Results: Should be able to create bind without being forced to set dlz and caps USE flags. ~ # emerge --info Portage 2.1.10.44 (default/linux/amd64/10.0/server, gcc-4.5.3, glibc-2.13-r4, 3.2.1-gentoo-r2 x86_64) ================================================================= System uname: Linux-3.2.1-gentoo-r2-x86_64-Intel-R-_Pentium-R-_D_CPU_3.00GHz-with-gentoo-2.0.3 Timestamp of tree: Fri, 24 Feb 2012 02:15:01 +0000 ccache version 3.1.6 [enabled] app-shells/bash: 4.1_p9 dev-lang/python: 2.7.2-r3, 3.1.4-r3, 3.2.2 dev-util/ccache: 3.1.6 dev-util/cmake: 2.8.6-r4 dev-util/pkgconfig: 0.26 sys-apps/baselayout: 2.0.3 sys-apps/openrc: 0.9.8.4 sys-apps/sandbox: 2.5 sys-devel/autoconf: 2.68 sys-devel/automake: 1.11.1 sys-devel/binutils: 2.21.1-r1 sys-devel/gcc: 4.5.3-r1 sys-devel/gcc-config: 1.4.1-r1 sys-devel/libtool: 2.4-r1 sys-devel/make: 3.82-r1 sys-kernel/linux-headers: 3.1 (virtual/os-headers) sys-libs/glibc: 2.13-r4 Repositories: gentoo ACCEPT_KEYWORDS="amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc /var/bind" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-O2 -pipe" DISTDIR="/usr/portage/distfiles" FEATURES="assume-digests binpkg-logs ccache distlocks ebuild-locks fixlafiles news protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch" FFLAGS="" GENTOO_MIRRORS="http://mirror.bytemark.co.uk/gentoo/ ftp://mirror.bytemark.co.uk/gentoo/ http://www.mirrorservice.org/sites/www.ibiblio.org/gentoo/ ftp://ftp.mirrorservice.org/sites/www.ibiblio.org/gentoo/ http://mirror.qubenet.net/mirror/gentoo/ ftp://mirror.qubenet.net/mirror/gentoo/ http://gentoo.virginmedia.com/ ftp://gentoo.virginmedia.com/sites/gentoo " LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en_GB en" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages" PORTAGE_TMPDIR="/var/tmp" PORTDIR="/usr/portage" PORTDIR_OVERLAY="" SYNC="rsync://rsync.uk.gentoo.org/gentoo-portage" USE="aac acl amd64 berkdb bzip2 cli cracklib crypt cxx dri flac gpm iconv lame mmx modules mudflap multilib ncurses nls nptl nptlonly ogg openmp pam pcre pppd readline session sse sse2 ssl sysfs tcpd threads truetype unicode wavpack xml xorg zlib" 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" 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 auth_digest authn_anon authn_dbd authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock dbd deflate dir disk_cache env expires ext_filter file_cache filter headers ident imagemap include info log_config logio mem_cache mime mime_magic negotiation proxy proxy_ajp proxy_balancer proxy_connect proxy_http rewrite setenvif so speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="kexi words flow plan 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="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en_GB en" PHP_TARGETS="php5-3" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga neomagic nouveau nv r128 radeon savage sis tdfx trident vesa via vmware dummy v4l" 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, LANG, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS
I think those restrictions are there for good reasons, so you will probably need to adjust your USE flags.
Why then am I compelled to have dynamic zone loading (dlz) described as a third party extension? It seems pointless to have a USE flag if one is compelled to have it set - get rid of the use flag altogether would surely be appropriate? I really do think this should be looked at a bit harder before dismissing it out of hand.
bind needs dlz for berkdb and caps for threads support. If you need those features then you have to enable the required use-deps as well.
