$ sudo emerge --oneshot portage | wgetpaste

!!! Multiple package instances within a single package slot have been pulled
!!! into the dependency graph, resulting in a slot conflict:

sys-apps/portage:0

  (sys-apps/portage-2.3.62-r1:0/0::gentoo, ebuild scheduled for merge) pulled in by
    sys-apps/portage (Argument)

  (sys-apps/portage-2.3.13-r1:0/0::gentoo, installed) pulled in by
    sys-apps/portage[python_targets_python2_7(-),python_targets_python3_5(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-)] required by (dev-java/java-config-2.2.0-r3:2/2::gentoo, installed)

    sys-apps/portage[python_targets_python2_7(-),python_targets_python3_5(-),-python_single_target_pypy(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-)] required by (app-portage/gentoolkit-0.4.0:0/0::gentoo, installed)

    sys-apps/portage[python_targets_python2_7(-),python_targets_python3_5(-),-python_single_target_pypy(-),-python_single_target_python2_7(-),-python_single_target_python3_4(-),-python_single_target_python3_5(-),-python_single_target_python3_6(-)] required by (app-portage/layman-2.4.2:0/0::gentoo, installed)



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. You may want to try a larger value of
the --backtrack option, such as --backtrack=30, in order to see if
that will solve this conflict automatically.

For more information, see MASKED PACKAGES section in the emerge man
page or refer to the Gentoo Handbook.


!!! The following installed packages are masked:
- dev-lang/python-3.4.5::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Michał Górny <mgorny@gentoo.org> (21 Mar 2019)
# Upstream EOL-ed Python 3.4 on 2019-03-19.  The last release fails
# to build against openssl-1.1+.
# Removal in 30 days.  Bug #673960.

- net-analyzer/dsniff-2.4_beta1-r10::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Michał Górny <mgorny@gentoo.org> (31 Mar 2019)
# Unmaintained.  Broken with new openssl (#674192) and new glibc
# (#643460).  Last upstream beta release in 2002.  Carries ever-growing
# pile of patches.  No reverse dependencies.
# Removal in 30 days.  Bug #674192.

- dev-libs/icu-58.2-r1::gentoo (masked by: package.mask)
/usr/portage/profiles/base/package.mask:
# Andreas Sturmlechner <asturm@gentoo.org> (15 Jul 2018)
# Old ICU is unsupported. ICU 58 only remains for 13.0 based profiles.

- sys-libs/binutils-libs-2.27::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Michał Górny <mgorny@gentoo.org>, Andreas K. Hüttel <dilfridge@gentoo.org>,
# Matthias Maier <tamiko@gentoo.org> (21 May 2017 and later updates)
# These old versions of toolchain packages (binutils, gcc, glibc) are no
# longer officially supported and are not suitable for general use. Using
# these packages can result in build failures (and possible breakage) for
# many packages, and may leave your system vulnerable to known security
# exploits.
# If you still use one of these old toolchain packages, please upgrade (and
# switch the compiler / the binutils) ASAP. If you need them for a specific
# (isolated) use case, feel free to unmask them on your system.

- sys-libs/glibc-2.25-r9::gentoo (masked by: package.mask)
- net-libs/libnsl-0::gentoo (masked by: package.mask)
/usr/portage/profiles/package.mask:
# Andreas K. Hüttel <dilfridge@gentoo.org> (11 Sep 2018)
# Mask transition ebuilds that were needed only for <glibc-2.26
# We will keep them in the tree as long as we have masked
# <glibc-2.26.

- net-libs/rpcsvc-proto-0::gentoo (masked by: package.mask)
- sys-devel/binutils-2.29.1-r1::gentoo (masked by: package.mask)
- x11-base/xorg-server-1.19.5::gentoo (masked by: package.mask)
- dev-lang/perl-5.24.3::gentoo (masked by: package.mask)
For more information, see the MASKED PACKAGES section in the emerge
man page or refer to the Gentoo Handbook.