'emerge --update --newuse --deep --with-bdeps=y @world' fails with: root@caiman:/root(22)# emerge --update --newuse --deep --with-bdeps=y @world Calculating dependencies... done! !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: dev-libs/icu:0 (dev-libs/icu-52.1::gentoo, installed) pulled in by >=dev-libs/icu-49:0/52= required by (dev-qt/qtcore-4.8.5-r1::gentoo, installed) dev-libs/icu:0/52= required by (dev-libs/dee-1.0.14-r2::gentoo, installed) dev-libs/icu:0/52= required by (dev-qt/qtwebkit-4.8.5::gentoo, installed) dev-libs/icu:0/52= required by (media-libs/libcdr-0.0.14::gentoo, installed) dev-libs/icu:0/52= required by (media-libs/libvisio-0.0.30::gentoo, installed) dev-libs/icu:0/52= required by (app-office/calligra-2.7.5::gentoo, installed) dev-libs/icu:0/52= required by (sys-apps/gptfdisk-0.8.8::gentoo, installed) dev-libs/icu:0/52=[abi_x86_64(-)] required by (dev-libs/libxml2-2.9.1-r2::gentoo, installed) dev-libs/icu:0/52= required by (media-libs/harfbuzz-0.9.23::gentoo, installed) dev-libs/icu:0/52= required by (app-text/libmspub-0.0.6::gentoo, installed) dev-libs/icu:0/52= required by (media-libs/raptor-2.0.9::gentoo, installed) dev-libs/icu:0/52= required by (dev-db/sqlite-3.8.2::gentoo, installed) (and 5 more with the same problems) (dev-libs/icu-51.2-r2::gentoo, ebuild scheduled for merge) pulled in by >=dev-libs/icu-4:0/51.2= required by (app-i18n/ibus-qt-1.3.1::gentoo, installed) media-gfx/exiv2:0 (media-gfx/exiv2-0.23-r2::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot) (media-gfx/exiv2-0.23-r1::gentoo, installed) pulled in by >=media-gfx/exiv2-0.21:0/0= required by (media-gfx/gthumb-3.2.4::gentoo, installed) media-gfx/exiv2:0/0= required by (app-office/calligra-2.7.5::gentoo, installed) media-libs/libopenraw:0 (media-libs/libopenraw-0.1.0_pre20130826::gentoo, installed) pulled in by >=media-libs/libopenraw-0.0.8:0/7= required by (media-gfx/gthumb-3.2.4::gentoo, installed) (media-libs/libopenraw-0.0.9::gentoo, ebuild scheduled for merge) pulled in by (no parents that aren't satisfied by other packages in this slot) It may be possible to solve this problem by using package.mask to prevent one of those packages from being selected. However, it is also possible that conflicting dependencies exist such that they are impossible to satisfy simultaneously. If such a conflict exists in the dependencies of two different packages, then those packages can not be installed simultaneously. For more information, see MASKED PACKAGES section in the emerge man page or refer to the Gentoo Handbook. emerge: there are no ebuilds built with USE flags to satisfy "dev-ruby/ffi[ruby_targets_ruby18]". !!! One of the following packages is required to complete your request: - dev-ruby/ffi-1.9.3::gentoo (Missing IUSE: ruby_targets_ruby18) - dev-ruby/ffi-1.4.0::gentoo (Missing IUSE: ruby_targets_ruby18) - dev-ruby/ffi-1.1.5::gentoo (Missing IUSE: ruby_targets_ruby18) (dependency required by "virtual/ruby-ffi-2[ruby_targets_ruby18]" [ebuild]) (dependency required by "dev-ruby/childprocess-0.3.9-r1[ruby_targets_ruby19]" [ebuild]) (dependency required by "app-emulation/vagrant-1.4.1[ruby_targets_ruby19]" [installed]) (dependency required by "@selected" [set]) (dependency required by "@world" [argument])
I was also getting this, cleared it by running 'emerge --nodeps =dev-libs/icu-52.1'
