The REQUIRED_USE variable app-cdr/gcdemu lacks the PYTHON_REQUIRED_USE variable which must be within REQUIRED_USE [1]. Here is a patch fixing the issue: --- gcdemu-2.1.1.ebuild 2014-04-26 10:31:03.000000000 +0200 +++ gcdemu-2.1.1-r1.ebuild 2014-08-31 19:21:50.551044893 +0200 @@ -19,6 +19,7 @@ SLOT="0" KEYWORDS="amd64 x86" IUSE="" +REQUIRED_USE="${PYTHON_REQUIRED_USE}" RDEPEND="${PYTHON_DEPS} app-cdr/cdemu-daemon:0/6 Reproducible: Always
$ emerge --info =app-cdr/gcdemu-2.1.1 Portage 2.2.12 (python 3.3.5-final-0, default/linux/amd64/13.0/desktop, gcc-4.9.1, glibc-2.19-r1, 3.16.1-gentoo x86_64) ================================================================= System Settings ================================================================= System uname: Linux-3.16.1-gentoo-x86_64-AMD_Phenom-tm-_8750_Triple-Core_Processor-with-gentoo-2.2 KiB Mem: 4054008 total, 552836 free KiB Swap: 2097148 total, 2097148 free Timestamp of tree: Fri, 29 Aug 2014 15:45:01 +0000 ld GNU ld (Gentoo 2.24 p1.4) 2.24 app-shells/bash: 4.2_p47 dev-java/java-config: 2.2.0 dev-lang/python: 2.7.8, 3.3.5-r1, 3.4.1 dev-util/cmake: 2.8.12.2-r2 dev-util/pkgconfig: 0.28-r2 sys-apps/baselayout: 2.2 sys-apps/openrc: 0.13.1 sys-apps/sandbox: 2.6-r1 sys-devel/autoconf: 2.13, 2.69 sys-devel/automake: 1.14.1 sys-devel/binutils: 2.24-r3 sys-devel/gcc: 4.9.1 sys-devel/gcc-config: 1.8 sys-devel/libtool: 2.4.2-r1 sys-devel/make: 4.0-r1 sys-kernel/linux-headers: 3.16 (virtual/os-headers) sys-libs/glibc: 2.19-r1 Repositories: gentoo ACCEPT_KEYWORDS="amd64 ~amd64" ACCEPT_LICENSE="* -@EULA" CBUILD="x86_64-pc-linux-gnu" CFLAGS="-march=amdfam10 -O2 -pipe" CHOST="x86_64-pc-linux-gnu" CONFIG_PROTECT="/etc" CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo" CXXFLAGS="-march=amdfam10 -O2 -pipe" DISTDIR="/usr/portage/distfiles" EMERGE_DEFAULT_OPTS="--with-bdeps=y --usepkg-exclude sys-fs/vhba --usepkg-exclude sys-kernel/gentoo-sources" FCFLAGS="-O2 -pipe" FEATURES="assume-digests binpkg-logs buildsyspkg config-protect-if-modified distlocks ebuild-locks fixlafiles getbinpkg merge-sync multilib-strict news noinfo 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://192.168.1.69/gentoo-portage/ http://ftp.df.lth.se/pub/gentoo/ rsync://ftp.df.lth.se/pub/gentoo/ http://mirror.mdfnet.se/gentoo" LANG="sv_SE" LDFLAGS="-Wl,-O1 -Wl,--as-needed" MAKEOPTS="-j3" 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="" SYNC="rsync://192.168.1.69/gentoo-portage/" USE="3dnow 3dnowext X a52 aac alloca alsa amd64 aspell cairo cd cdda cddb cdr consolekit cracklib cups curl dri drm dssi dvd dvdr exif ffmpeg fftw flac fltk gallium gif gimp glib gmp gnuplot gnutls gstreamer gtk gtk2 gtkstyle gudev hwdb inotify javascript jit jpeg keymap ladspa lame libkms libnotify lv2 mad mmx mmxext mp3 mpeg netifrc nls nptl ogg opengl openmp openrc orc pdf png policykit qt4 readline sse sse2 sse3 sse4_1 ssl startup-notification subversion svg svn theora threads thunar tiff truetype udev udisks unicode usb v4l vlc vorbis webgl x264 xcb xfce xorg xscreensaver zlib" ABI_X86="64" CURL_SSL="gnutls" ELIBC="glibc" GRUB_PLATFORMS="pc" INPUT_DEVICES="evdev" KERNEL="linux" LINGUAS="en en_GB sv sv_SE" PYTHON_SINGLE_TARGET="python3_3" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby20" USERLAND="GNU" VIDEO_CARDS="nouveau" XFCE_PLUGINS="trash" Unset: CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON
+*cdemu-3.0.0 (21 Feb 2015) + + 21 Feb 2015; Alexandre Rostovtsev <tetromino@gentoo.org> + -cdemu-2.1.0-r2.ebuild, cdemu-2.1.1.ebuild, +cdemu-3.0.0.ebuild, + +files/cdemu-3.0.0-bash-completion-dir.patch: + Version bump, adds image writing (bug #518590, thanks to Rafał Mużyło). + Add REQUIRED_USE (bug #521834, thanks to Karl Lindén). Drop old. +*gcdemu-3.0.0 (21 Feb 2015) + + 21 Feb 2015; Alexandre Rostovtsev <tetromino@gentoo.org> gcdemu-2.1.1.ebuild, + +gcdemu-3.0.0.ebuild: + Version bump, adds image writing (bug #518590, thanks to Rafał Mużyło). + Add REQUIRED_USE (bug #521834, thanks to Karl Lindén).