It seems that .egg-info files of dev-python/twisted are either missing, or in the wrong place. This breaks setuptools' pkg_resources.require I can see only /usr/lib/python2.6/site-packages/Twisted_Core-8.2.0-py2.6.egg-info It seem that a separate .egg-info file for Twisted (with _Core) is needed. Please also see : https://bugzilla.redhat.com/show_bug.cgi?id=523210 Reproducible: Always Steps to Reproduce: python -c 'import pkg_resources;print pkg_resources.require("Twisted>=2.4.0")' Actual Results: Traceback (most recent call last): File "<string>", line 1, in <module> File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 633, in require needed = self.resolve(parse_requirements(requirements)) File "/usr/lib/python2.6/site-packages/pkg_resources.py", line 531, in resolve raise DistributionNotFound(req) # XXX put more info here pkg_resources.DistributionNotFound: Twisted>=2.4.0 $ emerge --info Portage 2.1.6.13 (default/linux/x86/10.0/desktop, gcc-4.3.4, glibc-2.9_p20081201-r2, 2.6.32.2 i686) ================================================================= System uname: Linux-2.6.32.2-i686-Intel-R-_Core-TM-2_Duo_CPU_L7500_@_1.60GHz-with-gentoo-2.0.1 Timestamp of tree: Tue, 05 Jan 2010 08:45:03 +0000 ccache version 2.4 [enabled] app-shells/bash: 4.0_p35 dev-java/java-config: 2.1.9-r2 dev-lang/python: 2.6.4 dev-python/pycrypto: 2.1.0_beta1 dev-util/ccache: 2.4-r7 dev-util/cmake: 2.6.4-r3 sys-apps/baselayout: 2.0.1 sys-apps/openrc: 0.6.0 sys-apps/sandbox: 1.6-r2 sys-devel/autoconf: 2.13, 2.63-r1 sys-devel/automake: 1.5, 1.9.6-r2, 1.10.2 sys-devel/binutils: 2.18-r3 sys-devel/gcc-config: 1.4.1 sys-devel/libtool: 2.2.6b virtual/os-headers: 2.6.27-r2 ACCEPT_KEYWORDS="x86" CBUILD="i686-pc-linux-gnu" CFLAGS="-march=core2 -O2 -pipe -fomit-frame-pointer" CHOST="i686-pc-linux-gnu" CONFIG_PROTECT="/etc /usr/share/X11/xkb /usr/share/config" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/php/apache2-php5/ext-active/ /etc/php/cgi-php5/ext-active/ /etc/php/cli-php5/ext-active/ /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 /etc/udev/rules.d" CXXFLAGS="-march=core2 -O2 -pipe -fomit-frame-pointer" DISTDIR="/usr/portage/distfiles" FEATURES="ccache collision-protect distlocks fixpackages parallel-fetch protect-owned sandbox sfperms strict unmerge-orphans userfetch" GENTOO_MIRRORS="http://gentoo.tiscali.nl/" LANG="en_US.UTF-8" LDFLAGS="-Wl,-O1 -Wl,--as-needed" LINGUAS="en en_US de ja es fr it" MAKEOPTS="-j3" PKGDIR="/usr/portage/packages" PORTAGE_CONFIGROOT="/" PORTAGE_RSYNC_EXTRA_OPTS="--timeout=300" 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="/usr/local/portage/layman/sunrise /usr/local/portage/tom-overlay /home/tom/gentoo/sci /home/tom/gentoo/sage-on-gentoo" SYNC="rsync://rsync.europe.gentoo.org/gentoo-portage" USE="X a52 aac acl acpi alsa anthy apache2 avahi bash-completion berkdb bluetooth branding bzip2 cairo canna cddb cdparanoia cdr cjk cli consolekit cracklib crypt ctype cups curl cxx daap dbus djvu dri dts dvd dvdr eds emacs encode evo expat fam fbcon ffmpeg firefox flac fortran freewnn ftp gd gdbm gif gimp glut gmp gnutls gpm graphviz gstreamer gtk guile hal hdaps iconv ieee1394 imagemagick imap imlib ipod ipv6 java javascript jpeg kde latex ldap leim libnotify lm_sensors m17n-lib mad migemo mikmod mime mmx mng modules mp3 mp4 mpeg mplayer mudflap mule musicbrainz mysql mysqli ncurses nls nptl nptlonly nsplugin obex ocaml ogg oggvorbis openal opengl openmp pam pcmcia pcre pdf perl php plasma plotutils png policykit ppds pppd python qt3support qt4 quicktime readline reflection samba sasl sdl semantic-desktop session slang spell spl sqlite3 sse ssl startup-notification svg sysfs tcpd texlive theora threads thunar tiff tk truetype unicode usb v4l v4l2 visualization vorbis wicd wifi win32codecs wxwindows x264 x86 xcb xcomposite xine xinerama xml xorg xulrunner xv xvid zeroconf zlib zsh-completion" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1 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" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LINGUAS="en en_US de ja es fr it" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="intel" Unset: CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, FFLAGS, INSTALL_MASK, LC_ALL, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS
Fixed.
