[gentoo-user] curses of ncurses :(

[gevisz <gevisz@gmail.com>]

I do not understand:
1) why portage wants to upgrade ncurses-5.9-r3 to ncurses-5.9-r101
    (because it is marked),
2) why it can not,
3) what to do with this block.

$ eix ncurses

[I] sys-libs/ncurses
     Available versions:
     (0)    5.9-r3 ~5.9-r4 ~6.0(0/6)
     (5)    ~5.9-r101(5/5)
       {ada +cxx debug doc gpm minimal profile static-libs test
threads tinfo trace unicode ABI_MIPS="n32 n64 o32" ABI_PPC="32 64"
ABI_S390="32 64" ABI_X86="32 64 x32"}
     Installed versions:  5.9-r3(10:48:01 PM 03/29/2015)(cxx gpm
unicode -ada -debug -doc -minimal -profile -static-libs -tinfo -trace
ABI_MIPS="-n32 -n64 -o32" ABI_PPC="-32 -64" ABI_S390="-32 -64"
ABI_X86="32 64 -x32")
     Homepage:            https://www.gnu.org/software/ncurses/
http://dickey.his.com/ncurses/
     Description:         console display library

# emerge --update --deep --with-bdeps=y --newuse --backtrack=90 --ask world

These are the packages that would be merged, in order:

Calculating dependencies... done!
[ebuild     U  ] dev-util/diffstat-1.60 [1.58]
[ebuild     U  ] dev-libs/libnl-3.2.26 [3.2.25]
[ebuild     U  ] dev-libs/openssl-1.0.2d [1.0.1p] USE="asm%* -sctp%"
[ebuild  NS   ~] sys-libs/ncurses-5.9-r101 [5.9-r3] USE="gpm unicode
-tinfo" ABI_X86="32 (64) (-x32)"
[ebuild     U  ] www-client/firefox-38.2.0 [38.1.1]
[blocks B      ] <sys-libs/ncurses-6:0 ("<sys-libs/ncurses-6:0" is
blocking sys-libs/ncurses-5.9-r101)

 * Error: The above package list contains packages which cannot be
 * installed at the same time on the same system.

  (sys-libs/ncurses-5.9-r101:5/5::gentoo, ebuild scheduled for merge)
pulled in by
    >=sys-libs/ncurses-5.7-r7[unicode?]
(>=sys-libs/ncurses-5.7-r7[unicode]) required by
(sys-process/procps-3.3.9-r2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2 required by
(app-editors/vim-7.4.273:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2 required by
(app-editors/gvim-7.4.273:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.1 required by
(app-shells/zsh-5.0.5:0/0::gentoo, installed)
    sys-libs/ncurses required by
(dev-lang/ruby-1.9.3_p551-r1:1.9/1.9::gentoo, installed)
    >=sys-libs/ncurses-5.2 required by (sys-apps/less-478:0/0::gentoo,
installed)
    >=sys-libs/ncurses-5.2-r5 required by
(sys-boot/grub-2.02_beta2-r7:2/2::gentoo, installed)
    >=sys-libs/ncurses-5.2 required by
(sys-kernel/gentoo-sources-4.0.5:4.0.5/4.0.5::gentoo, installed)
    >=sys-libs/ncurses-5.2:5/5= required by
(app-emulation/wine-1.6.2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2-r5[unicode?]
(>=sys-libs/ncurses-5.2-r5[unicode]) required by
(dev-util/dialog-1.2.20150528:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2 required by
(dev-lang/python-3.4.1:3.4/3.4::gentoo, installed)
    >=sys-libs/ncurses-5.2:= required by
(app-emulation/wine-1.6.2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.9-r3:5/5=[abi_x86_32(-),abi_x86_64(-)]
required by (sys-devel/llvm-3.5.0:0/3.5::gentoo, installed)
    >=sys-libs/ncurses-5.1 required by
(mail-client/alpine-2.00-r5:0/0::gentoo, installed)
    sys-libs/ncurses required by
(sys-devel/gettext-0.19.4:0/0::gentoo, installed)
    sys-libs/ncurses[unicode] required by
(dev-lang/ghc-7.6.3-r1:0/7.6.3::gentoo, installed)
    sys-libs/ncurses required by (sys-libs/slang-2.2.4-r1:0/0::gentoo,
installed)
    sys-libs/ncurses:5/5= required by
(sci-mathematics/octave-3.8.2:0/3.8.2::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2 required by
(sys-apps/util-linux-2.25.2-r2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7 required by
(sys-process/psmisc-22.21-r2:0/0::gentoo, installed)
    sys-libs/ncurses required by
(dev-libs/xmlrpc-c-1.32.05-r1:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7 required by
(www-client/links-2.8-r1:2/2::gentoo, installed)
    >=sys-libs/ncurses-5.9-r3[abi_x86_32(-)] required by
(app-emulation/wine-1.6.2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2 required by
(app-shells/bash-4.3_p39:0/0::gentoo, installed)

  (sys-libs/ncurses-5.9-r3:0/0::gentoo, installed) pulled in by
    sys-libs/ncurses required by (app-text/hunspell-1.3.3:0/0::gentoo,
installed)
    >=sys-libs/ncurses-5.7-r7:0= required by
(media-sound/lame-3.99.5-r1:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7:0= required by
(sys-block/parted-3.2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7:0= required by
(media-sound/alsa-utils-1.0.29:0.9/0.9::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2:0= required by
(sys-devel/gdb-7.7.1:0/0::gentoo, installed)
    sys-libs/ncurses:0=[unicode] required by
(media-video/vlc-2.1.5-r1:0/5-7::gentoo, installed)
    sys-libs/ncurses:0= required by (dev-util/cmake-3.2.2:0/0::gentoo,
installed)
    sys-libs/ncurses required by (app-admin/eselect-1.4.4:0/0::gentoo,
installed)
    sys-libs/ncurses:0= required by
(sci-mathematics/octave-3.8.2:0/3.8.2::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7:0= required by
(dev-libs/libcdio-0.92:0/15::gentoo, installed)
    >=sys-libs/ncurses-5.7-r7:0= required by
(sys-apps/gptfdisk-0.8.10:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.9-r3[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]
(>=sys-libs/ncurses-5.9-r3[abi_x86_32(-),abi_x86_64(-)]) required by
(sys-libs/gpm-1.20.7-r2:0/0::gentoo, installed)
    sys-libs/ncurses:0= required by
(dev-lang/ruby-2.0.0_p645:2.0/2.0::gentoo, installed)
    >=sys-libs/ncurses-5.2-r2 required by
(sys-apps/texinfo-5.2:0/0::gentoo, installed)
    sys-libs/ncurses:0= required by
(dev-scheme/guile-1.8.8-r1:12/12::gentoo, installed)
    >=sys-libs/ncurses-5.9-r3[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]
(>=sys-libs/ncurses-5.9-r3[abi_x86_32(-),abi_x86_64(-)]) required by
(sys-libs/readline-6.3_p8-r2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2 required by
(dev-lang/python-2.7.9-r1:2.7/2.7::gentoo, installed)
    sys-libs/ncurses:0= required by
(app-crypt/pinentry-0.9.0:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.9-r3:0=[abi_x86_32(-)?,abi_x86_64(-)?,abi_x86_x32(-)?,abi_mips_n32(-)?,abi_mips_n64(-)?,abi_mips_o32(-)?,abi_ppc_32(-)?,abi_ppc_64(-)?,abi_s390_32(-)?,abi_s390_64(-)?]
(>=sys-libs/ncurses-5.9-r3:0=[abi_x86_32(-),abi_x86_64(-)]) required
by (sys-devel/llvm-3.5.0:0/3.5::gentoo, installed)
    sys-libs/ncurses:0=[unicode?] (sys-libs/ncurses:0=[unicode])
required by (www-client/lynx-2.8.8_p2:0/0::gentoo, installed)
    >=sys-libs/ncurses-5.2:0= required by
(app-text/aspell-0.60.6.1-r1:0/0::gentoo, installed)
    sys-libs/ncurses:0= required by (sys-apps/openrc-0.17:0/0::gentoo,
installed)
    >=sys-libs/ncurses-5.2 required by
(sys-devel/bc-1.06.95-r1:0/0::gentoo, installed)
    sys-libs/ncurses:0= required by
(x11-libs/vte-0.28.2-r207:0/0::gentoo, installed)


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


The following keyword changes are necessary to proceed:
 (see "package.accept_keywords" in the portage(5) man page for more details)
# required by app-emulation/wine-1.6.2::gentoo
# required by @selected
# required by @world (argument)
=sys-libs/ncurses-5.9-r101 ~amd64

Would you like to add these changes to your config files? [Yes/No] n

Any thoughts?

P.S. Adding =sys-libs/ncurses-5.9-r101 ~amd64 to package.accept_keywords
      does not help at all.