# emerge -avuDN @world --backtrack=30 Local copy of remote index is up-to-date and will be used. Local copy of remote index is up-to-date and will be used. These are the packages that would be merged, in order: Calculating dependencies... done! !!! Multiple package instances within a single package slot have been pulled !!! into the dependency graph, resulting in a slot conflict: sci-libs/opencascade:0 (sci-libs/opencascade-7.7.0:0/7.7::gentoo, ebuild scheduled for merge) USE="ffmpeg vtk -doc -examples -freeimage -gles2 -json -optimize (-tbb)" ABI_X86="(64)" pulled in by (no parents that aren't satisfied by other packages in this slot) (sci-libs/opencascade-7.6.3:0/7.6::gentoo, installed) USE="ffmpeg vtk -doc -eigen -examples -freeimage -gles2 -json -optimize -tbb" ABI_X86="(64)" pulled in by >=sci-libs/opencascade-7.3.0:0/7.6= required by (sci-electronics/kicad-6.0.7:0/0::gentoo, binary scheduled for merge) USE="nls occ openmp pcm -doc -examples (-ngspice)" ABI_X86="(64)" PYTHON_SINGLE_TARGET="python3_10 -python3_8 -python3_9" ^^^^^^^ 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. The following packages are causing rebuilds: (dev-lang/perl-5.36.0-r1:0/5.36::gentoo, binary scheduled for merge) causes rebuilds for: (virtual/perl-Carp-1.520.0-r2:0/0::gentoo, binary scheduled for merge) (virtual/perl-File-Temp-0.231.100:0/0::gentoo, binary scheduled for merge) (dev-perl/HTML-Parser-3.760.0:0/0::gentoo, binary scheduled for merge) (net-fs/samba-4.15.12-r2:0/0::gentoo, binary scheduled for merge) (virtual/perl-File-Path-2.180.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/Parse-Yapp-1.210.0-r1:0/0::gentoo, binary scheduled for merge) (virtual/perl-parent-0.238.0-r2:0/0::gentoo, binary scheduled for merge) (dev-perl/TimeDate-2.330.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/Crypt-PasswdMD5-1.410.0:0/0::gentoo, binary scheduled for merge) (dev-perl/Mozilla-CA-20999999-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/LWP-MediaTypes-6.40.0:0/0::gentoo, binary scheduled for merge) (virtual/perl-Time-Local-1.300.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/HTML-Tagset-3.200.0-r2:0/0::gentoo, binary scheduled for merge) (dev-perl/Authen-SASL-2.160.0-r2:0/0::gentoo, binary scheduled for merge) (virtual/perl-Compress-Raw-Bzip2-2.103.0-r3:0/0::gentoo, binary scheduled for merge) (dev-perl/IPC-System-Simple-1.300.0:0/0::gentoo, binary scheduled for merge) (dev-perl/Error-0.170.290:0/0::gentoo, binary scheduled for merge) (dev-perl/Net-SSLeay-1.920.0:0/0::gentoo, binary scheduled for merge) (dev-perl/MIME-tools-5.509.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/File-DesktopEntry-0.220.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/IO-Socket-SSL-2.72.0:0/0::gentoo, binary scheduled for merge) (dev-perl/Digest-SHA1-2.130.0-r2:0/0::gentoo, binary scheduled for merge) (dev-perl/Socket6-0.290.0:0/0::gentoo, binary scheduled for merge) (dev-perl/URI-5.100.0:0/0::gentoo, binary scheduled for merge) (dev-perl/Digest-HMAC-1.40.0:0/0::gentoo, binary scheduled for merge) (virtual/perl-Digest-MD5-2.580.0-r1:0/0::gentoo, binary scheduled for merge) (perl-core/File-Temp-0.231.100:0/0::gentoo, binary scheduled for merge) (dev-perl/HTTP-Message-6.330.0:0/0::gentoo, binary scheduled for merge) (dev-perl/CGI-4.530.0:0/0::gentoo, binary scheduled for merge) (virtual/perl-Digest-SHA-6.20.0-r3:0/0::gentoo, binary scheduled for merge) (perl-core/Compress-Raw-Zlib-2.202.0:0/0::gentoo, binary scheduled for merge) (dev-perl/File-MimeInfo-0.300.0:0/0::gentoo, binary scheduled for merge) (dev-perl/IO-HTML-1.4.0:0/0::gentoo, binary scheduled for merge) (dev-perl/File-BaseDir-0.90.0:0/0::gentoo, binary scheduled for merge) (virtual/perl-Compress-Raw-Zlib-2.202.0:0/0::gentoo, binary scheduled for merge) (virtual/perl-MIME-Base64-3.160.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/HTTP-Date-6.50.0:0/0::gentoo, binary scheduled for merge) (dev-perl/Encode-Locale-1.50.0-r1:0/0::gentoo, binary scheduled for merge) (dev-perl/MailTools-2.210.0:0/0::gentoo, binary scheduled for merge) (dev-qt/qtgui-5.15.7:5/5.15.7::gentoo, binary scheduled for merge) causes rebuilds for: (dev-qt/qtwidgets-5.15.7:5/5.15::gentoo, binary scheduled for merge) (dev-qt/qtwayland-5.15.7:5/5.15.7::gentoo, binary scheduled for merge) (dev-qt/qtdeclarative-5.15.7:5/5.15::gentoo, binary scheduled for merge) (x11-misc/qt5ct-1.5:0/0::gentoo, binary scheduled for merge) (dev-libs/icu-72.1:0/72.1::gentoo, binary scheduled for merge) causes rebuilds for: (app-text/libmspub-0.1.4:0/0::gentoo, binary scheduled for merge) (dev-libs/libical-3.0.14-r1:0/3::gentoo, binary scheduled for merge) (app-text/libqxp-0.0.2:0/0::gentoo, binary scheduled for merge) (dev-libs/boost-1.80.0-r1:0/1.80.0::gentoo, binary scheduled for merge) (media-libs/raptor-2.0.15-r7:2/2::gentoo, binary scheduled for merge) (media-libs/libvisio-0.1.7:0/0::gentoo, binary scheduled for merge) (media-libs/libcdr-0.1.7:0/0::gentoo, binary scheduled for merge) (media-libs/harfbuzz-5.3.1-r1:0/4.0.0::gentoo, binary scheduled for merge) (media-libs/libzmf-0.0.2-r1:0/0::gentoo, binary scheduled for merge) (app-text/libebook-0.1.3-r2:0/0::gentoo, binary scheduled for merge) The following keyword changes are necessary to proceed: (see "package.accept_keywords" in the portage(5) man page for more details) # required by @__auto_slot_operator_replace_installed__ (argument) =sci-libs/opencascade-7.7.0 ~amd64 # required by sci-libs/opencascade-7.7.0::gentoo[vtk] # required by @__auto_slot_operator_replace_installed__ (argument) =sci-libs/vtk-9.2.2-r1 ~amd64 # required by sci-libs/vtk-9.2.2-r1::gentoo # required by sci-libs/opencascade-7.7.0::gentoo[vtk] # required by @__auto_slot_operator_replace_installed__ (argument) =media-libs/libharu-2.4.2-r1 ~amd64 Would you like to add these changes to your config files? [Yes/No] n * In order to avoid wasting time, backtracking has terminated early * due to the above autounmask change(s). The --autounmask-backtrack=y * option can be used to force further backtracking, but there is no * guarantee that it will produce a solution. !!! All ebuilds that could satisfy "