'emerge -uvDN sage' fails with: root@lynx:/usr/src(94)# emerge -uvDN sage These are the packages that would be merged, in order: Calculating dependencies... done! [ebuild R ] sci-libs/atlas-3.11.39::science USE="deprecated doc fortran lapack threads -generic -ifko -static-libs" KERNEL="(linux%*)" 0 KiB [ebuild R ] dev-python/simplejson-3.15.0::gentoo PYTHON_TARGETS="python2_7 python3_5 python3_6 -pypy -pypy3 -python3_4 -python3_7%" 0 KiB [ebuild UD ] dev-lisp/ecls-16.1.2-r1:0/16.1.2::sage-on-gentoo [16.1.3:0/16.1.3::gentoo] USE="X cxx emacs libatomic threads unicode -debug -gengc -precisegc" CPU_FLAGS_X86="sse" 0 KiB [ebuild N ] dev-python/twisted-core-15.2.1::gentoo USE="crypt gtk -serial {-test}" PYTHON_TARGETS="python2_7" 0 KiB [ebuild N ] dev-python/twisted-web-15.2.1::gentoo USE="soap" PYTHON_TARGETS="python2_7" 0 KiB [ebuild N ] dev-python/twisted-names-15.2.1::gentoo PYTHON_TARGETS="python2_7" 0 KiB [ebuild N ] dev-python/twisted-mail-15.2.1::gentoo PYTHON_TARGETS="python2_7" 0 KiB [ebuild UD ] sci-mathematics/maxima-5.39.0-r1::sage-on-gentoo [5.41.0-r2::sage-on-gentoo] USE="X ecls emacs nls sbcl tk unicode -clisp -clozurecl (-cmucl) -gcl" L10N="de -es -pt -pt-BR" 0 KiB [ebuild UD ] dev-python/sphinx-1.6.7-r1::gentoo [1.7.5-r1::sage-on-gentoo] USE="latex -doc -net {-test}" PYTHON_TARGETS="python2_7 python3_5 python3_6 -pypy -pypy3 -python3_4" 0 KiB [ebuild N ] sci-mathematics/sage-notebook-1.0.3-r1::sage-on-gentoo USE="java server {-test}" PYTHON_TARGETS="python2_7" 0 KiB [ebuild N ] sci-mathematics/sage-8.2-r2::sage-on-gentoo USE="X doc-html-bin latex sagenb -bliss -debug -doc-html -doc-pdf -doc-pdf-bin -jmol -libbraiding -libhomfly -modular_decomposition -testsuite" L10N="de en fr ru -ca -es -hu -it -ja -pt -tr" PYTHON_TARGETS="python2_7 python3_6" 0 KiB [blocks B ] dev-python/twisted-core ("dev-python/twisted-core" is blocking dev-python/twisted-18.7.0) [blocks B ] dev-python/twisted-web ("dev-python/twisted-web" is blocking dev-python/twisted-18.7.0) [blocks B ] dev-python/twisted ("dev-python/twisted" is blocking dev-python/twisted-mail-15.2.1, dev-python/twisted-names-15.2.1, dev-python/twisted-web-15.2.1, dev-python/twisted-core-15.2.1) [blocks B ] dev-python/twisted-mail ("dev-python/twisted-mail" is blocking dev-python/twisted-18.7.0) [blocks B ] dev-python/twisted-names ("dev-python/twisted-names" is blocking dev-python/twisted-18.7.0) Total: 11 packages (3 downgrades, 6 new, 2 reinstalls), Size of downloads: 0 KiB Conflict: 5 blocks (5 unsatisfied) * Error: The above package list contains packages which cannot be * installed at the same time on the same system. (dev-python/twisted-core-15.2.1:0/0::gentoo, ebuild scheduled for merge) pulled in by =dev-python/twisted-core-15.2*[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (=dev-python/twisted-core-15.2*[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (dev-python/twisted-names-15.2.1:0/0::gentoo, ebuild scheduled for merge) dev-python/twisted-core[python_targets_python2_7(-),-python_single_target_jython2_7(-),-python_single_target_pypy(-),-python_single_target_pypy3(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-),python_single_target_python2_7(+)] required by (sci-visualization/paraview-5.5.0:0/0::gentoo, installed) >=dev-python/twisted-core-14.0.0[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (>=dev-python/twisted-core-14.0.0[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (sci-mathematics/sage-notebook-1.0.3-r1:0/0::sage-on-gentoo, ebuild scheduled for merge) =dev-python/twisted-core-15.2*[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (=dev-python/twisted-core-15.2*[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (dev-python/twisted-mail-15.2.1:0/0::gentoo, ebuild scheduled for merge) =dev-python/twisted-core-15.2*[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (=dev-python/twisted-core-15.2*[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (dev-python/twisted-web-15.2.1:0/0::gentoo, ebuild scheduled for merge) (dev-python/twisted-18.7.0:0/0::gentoo, installed) pulled in by >=dev-python/twisted-16.0.0[python_targets_python2_7(-)?,python_targets_python3_4(-)?,python_targets_python3_5(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-)] (>=dev-python/twisted-16.0.0[python_targets_python2_7(-),python_targets_python3_5(-),python_targets_python3_6(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-)]) required by (www-servers/tornado-5.1:0/0::gentoo, installed) (dev-python/twisted-web-15.2.1:0/0::gentoo, ebuild scheduled for merge) pulled in by >=dev-python/twisted-web-14.0.0[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (>=dev-python/twisted-web-14.0.0[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (sci-mathematics/sage-notebook-1.0.3-r1:0/0::sage-on-gentoo, ebuild scheduled for merge) (dev-python/twisted-mail-15.2.1:0/0::gentoo, ebuild scheduled for merge) pulled in by >=dev-python/twisted-mail-14.0.0[python_targets_python2_7(-)?,-python_single_target_python2_7(-)] (>=dev-python/twisted-mail-14.0.0[python_targets_python2_7(-),-python_single_target_python2_7(-)]) required by (sci-mathematics/sage-notebook-1.0.3-r1:0/0::sage-on-gentoo, ebuild scheduled for merge) For more information about Blocked Packages, please refer to the following section of the Gentoo Linux x86 Handbook (architecture is irrelevant): https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages
For more information about Blocked Packages, please refer to the following section of the Gentoo Linux x86 Handbook (architecture is irrelevant): https://wiki.gentoo.org/wiki/Handbook:X86/Working/Portage#Blocked_packages It is sad to read that you have problems with the software. The situation seems to be a bit more complicate and requires some analysis. We can not help you efficiently via bug tracker. The bug tracker aims rather on specific problems in .ebuilds and less on individual systems. I have had very good experience on the gentoo IRC [1] with questions like this. Of course there are also forums and mailing lists [2,3]. I hope you understand, that I will close the bug here therefore and wish you good luck on one of the mentioned channels [4]. Please reopen the ticket in order to provide an indication for an specific error in an ebuild or any gentoo related product. [1] https://www.gentoo.org/get-involved/irc-channels/ [2] https://forums.gentoo.org/ [3] https://www.gentoo.org/get-involved/mailing-lists/all-lists.html [4] https://www.gentoo.org/support/
Masking >=www-servers/tornado-5.1 solved the issue for me.