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

Calculating dependencies  ....... done!
[ebuild     U  ] app-editors/nano-2.9.0::gentoo [2.7.5::gentoo] USE="magic ncurses nls spell unicode -debug -justify -minimal -slang -static" 0 KiB
[ebuild     U  ] dev-python/six-1.11.0::gentoo [1.10.0::gentoo] USE="-doc {-test}" PYTHON_TARGETS="python2_7 python3_4 -pypy -pypy3 -python3_5 -python3_6" 0 KiB
[nomerge       ] net-nntp/sabnzbd-2.3.1::gentoo  USE="7za rar -unzip" PYTHON_TARGETS="python2_7" 
[nomerge       ]  app-arch/p7zip-16.02-r1::gentoo  USE="pch wxwidgets -doc -kde -rar (-static)" ABI_X86="(-x32)" 
[nomerge       ]   x11-libs/wxGTK-3.0.2.0-r3:3.0::gentoo  USE="X gstreamer libnotify opengl sdl tiff (-aqua) -debug -doc -webkit" ABI_X86="(64) -32 (-x32)" 
[nomerge       ]    x11-libs/gtk+-2.24.31-r1:2::gentoo  USE="cups introspection (-aqua) -examples {-test} -vim-syntax -xinerama" ABI_X86="(64) -32 (-x32)" 
[nomerge       ]     net-print/cups-2.2.6::gentoo  USE="X acl dbus pam ssl systemd threads usb -debug -java -kerberos -lprng-compat -python (-selinux) -static-libs -xinetd -zeroconf" ABI_X86="(64) -32 (-x32)" LINGUAS="ca cs de es fr it ja ru" PYTHON_TARGETS="python2_7" 
[nomerge       ]      net-print/cups-filters-1.17.9::gentoo  USE="dbus foomatic jpeg ldap pdf png postscript tiff -ipp_autosetup -pclm -perl -static-libs {-test} -zeroconf" 
[nomerge       ]       app-text/ghostscript-gpl-9.21::gentoo  USE="X cups dbus gtk tiff unicode -static-libs" L10N="-de -ja -ko -zh-CN -zh-TW" 
[ebuild     U  ]        net-dns/libidn-1.33-r2::gentoo [1.33-r1::gentoo] USE="nls -doc -emacs -java -mono -static-libs" ABI_X86="(64) -32 (-x32)" 0 KiB
[nomerge       ] dev-lisp/uiop-3.3.1::gentoo 
[ebuild  N     ]  virtual/commonlisp-0::gentoo  0 KiB
[ebuild  N     ]   dev-lisp/sbcl-1.4.1:0/1.4.1::gentoo  USE="threads unicode zlib -debug -doc -pax_kernel -source" 0 KiB
[ebuild     U  ] app-portage/portage-utils-0.64-r1::gentoo [0.64::gentoo] USE="nls -static" 0 KiB

Total: 6 packages (4 upgrades, 2 new), Size of downloads: 0 KiB

WARNING: One or more updates/rebuilds have been skipped due to a dependency conflict:

dev-util/ragel:0

  (dev-util/ragel-7.0.0.10:0/0::gentoo, ebuild scheduled for merge) conflicts with
    =dev-util/ragel-6* required by (dev-ruby/redcloth-4.3.2:0/0::gentoo, installed)
    ^               ^^