setuptools and certifi block eachother/circular dependency

To be honest I'm not entirely sure where the issue is, could the it's in the stage3 itself and not the Docker image, wasn't able to figure it out entirely. If anyone has any suggestions/pointers please let me know.

When using the current images for stage3-amd64 (sha256:4fd2075ee41636e0042dad5210518a8513404296b961cc0f43792621abc87864) and portage (sha256:d74cfaccc16c8e72150af45ce564d46a8b3f37c0a9832b0f2a9a0190a7774ac8) I get the following blocker when emerging setuptools

15ecbe990357 /usr/local/portage # emerge -av setuptools 

 * IMPORTANT: 6 news items need reading for repository 'gentoo'.
 * Use eselect news read to view new items.

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

Calculating dependencies... done!
[ebuild     U  ] dev-python/setuptools-44.1.0::gentoo [44.0.0::gentoo] USE="-test" PYTHON_TARGETS="python2_7 python3_7* (-pypy3) -python3_6* (-python3_8)" 839 KiB
[ebuild   R    ] dev-python/certifi-2019.11.28::gentoo  PYTHON_TARGETS="python2_7 python3_7* (-pypy3) -python3_6* (-python3_8)" 153 KiB

Total: 2 packages (1 upgrade, 1 reinstall), Size of downloads: 992 KiB

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

dev-python/setuptools:0

  (dev-python/setuptools-44.1.0:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_7 (-pypy3) -python3_6 (-python3_8)" pulled in by
    dev-python/setuptools[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/certifi-2019.11.28:0/0::gentoo, ebuild scheduled for merge) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_7 (-pypy3) -python3_6 (-python3_8)"

    >=dev-python/setuptools-42.0.2[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/certifi-2019.11.28:0/0::gentoo, ebuild scheduled for merge) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_7 (-pypy3) -python3_6 (-python3_8)"

    dev-python/setuptools (Argument)

  (dev-python/setuptools-44.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)" pulled in by
    dev-python/setuptools[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/certifi-2019.11.28:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)"

    >=dev-python/setuptools-42.0.2[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/certifi-2019.11.28:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)"

    >=dev-python/setuptools-42.0.2[python_targets_pypy3(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (app-portage/gemato-14.3:0/0::gentoo, installed) USE="blake2 bzip2 gpg -lzma -sha3 -test -tools" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)"

    >=dev-python/setuptools-42.0.2[python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-util/meson-0.52.1:0/0::gentoo, installed) USE="(-test)" ABI_X86="(64)" PYTHON_TARGETS="python3_6 -python3_7 (-python3_8)"

dev-python/certifi:0

  (dev-python/certifi-2019.11.28:0/0::gentoo, ebuild scheduled for merge) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_7 (-pypy3) -python3_6 (-python3_8)" pulled in by
    >=dev-python/certifi-2016.9.26[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/setuptools-44.1.0:0/0::gentoo, ebuild scheduled for merge) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_7 (-pypy3) -python3_6 (-python3_8)"

  (dev-python/certifi-2019.11.28:0/0::gentoo, installed) USE="" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)" pulled in by
    >=dev-python/certifi-2016.9.26[python_targets_pypy3(-)?,python_targets_python2_7(-)?,python_targets_python3_6(-)?,python_targets_python3_7(-)?,python_targets_python3_8(-)?,-python_single_target_pypy3(-),-python_single_target_python2_7(-),-python_single_target_python3_6(-),-python_single_target_python3_7(-),-python_single_target_python3_8(-)] required by (dev-python/setuptools-44.0.0:0/0::gentoo, installed) USE="-test" ABI_X86="(64)" PYTHON_TARGETS="python2_7 python3_6 (-pypy3) -python3_7 (-python3_8)"

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:
- sys-libs/glibc-2.29-r7::gentoo (masked by: package.mask)
/var/db/repos/gentoo/profiles/package.mask:
# Michał Górny <mgorny@gentoo.org>, Andreas K. Hüttel <dilfridge@gentoo.org>,
# Matthias Maier <tamiko@gentoo.org> (2017-05-21 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.

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

Looking at the USE flags for both setuptools and certifi it seems like the Docker image is not up to date because it's still using python3_6?

15ecbe990357 /usr/local/portage # eix setuptools
[U] dev-python/setuptools
     Available versions:  44.0.0^t 44.1.0^t{xpak} [M]~45.3.0^t [M]~46.1.3^t {test PYTHON_TARGETS="pypy3 python2_7 python3_6 python3_7 python3_8"}
     Installed versions:  44.0.0^t(00:40:16 03/30/20)(-test PYTHON_TARGETS="python2_7 python3_6 -pypy3 -python3_7 -python3_8")
     Homepage:            https://github.com/pypa/setuptools https://pypi.org/project/setuptools/
     Description:         Collection of extensions to Distutils

15ecbe990357 /usr/local/portage # eix certifi
...
[I] dev-python/certifi
     Available versions:  2019.11.28{xpak} ~2020.4.5.1 {PYTHON_TARGETS="pypy3 python2_7 python3_6 python3_7 python3_8"}
     Installed versions:  2019.11.28{xpak}(00:40:33 03/30/20)(PYTHON_TARGETS="python2_7 python3_6 -pypy3 -python3_7 -python3_8")
     Homepage:            http://certifi.io/ https://pypi.org/project/certifi
     Description:         Python package for providing Mozilla's CA Bundle
...

emerge --info does list python 3.7 as the default together with 2.7 though

15ecbe990357 /usr/local/portage # emerge --info
Portage 2.3.89 (python 3.6.10-final-0, default/linux/amd64/17.1, gcc-9.3.0, glibc-2.29-r7, 4.15.17-gentoo-simon-1.1.3-dracut x86_64)
=================================================================
System uname: Linux-4.15.17-gentoo-simon-1.1.3-dracut-x86_64-Intel-R-_Core-TM-_i5-3570K_CPU_@_3.40GHz-with-gentoo-2.6
KiB Mem:    16350992 total,   4273392 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Sat, 09 May 2020 00:45:01 +0000
Head commit of repository gentoo: 97347298ed44c9d9db3c07dcf268f3bb5a93f244
sh bash 4.4_p23-r1
ld GNU ld (Gentoo 2.33.1 p2) 2.33.1
app-shells/bash:          4.4_p23-r1::gentoo
dev-lang/perl:            5.30.1::gentoo
dev-lang/python:          2.7.17-r2::gentoo, 3.6.10-r1::gentoo, 3.7.7-r1::gentoo
sys-apps/baselayout:      2.6-r1::gentoo
sys-apps/openrc:          0.42.1::gentoo
sys-apps/sandbox:         2.13::gentoo
sys-devel/autoconf:       2.69-r4::gentoo
sys-devel/automake:       1.16.1-r1::gentoo
sys-devel/binutils:       2.33.1-r1::gentoo
sys-devel/gcc:            9.3.0::gentoo
sys-devel/gcc-config:     2.2.1::gentoo
sys-devel/libtool:        2.4.6-r6::gentoo
sys-devel/make:           4.2.1-r4::gentoo
sys-kernel/linux-headers: 5.4::gentoo (virtual/os-headers)
sys-libs/glibc:           2.29-r7::gentoo
Repositories:

gentoo
    location: /var/db/repos/gentoo
    sync-type: rsync
    sync-uri: rsync://rsync.gentoo.org/gentoo-portage
    priority: -1000
    sync-rsync-verify-metamanifest: yes
    sync-rsync-verify-max-age: 24
    sync-rsync-verify-jobs: 1
    sync-rsync-extra-opts: 

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-O2 -pipe"
DISTDIR="/var/cache/distfiles"
ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-docompress binpkg-dostrip binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles ipc-sandbox merge-sync multilib-strict network-sandbox news parallel-fetch pid-sandbox preserve-libs protect-owned qa-unresolved-soname-deps sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
PKGDIR="/var/cache/binpkgs"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --omit-dir-times --compress --force --whole-file --delete --stats --human-readable --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages --exclude=/.git"
PORTAGE_TMPDIR="/var/tmp"
USE="acl amd64 berkdb bzip2 cli crypt dri fortran gdbm iconv ipv6 libtirpc multilib ncurses nls nptl openmp pam pcre readline seccomp split-usr ssl tcpd unicode xattr zlib" ABI_X86="64" ADA_TARGET="gnat_2018" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" CPU_FLAGS_X86="mmx mmxext sse sse2" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock greis isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="libinput" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_7" PYTHON_TARGETS="python2_7 python3_7" RUBY_TARGETS="ruby24 ruby25" USERLAND="GNU" VIDEO_CARDS="amdgpu fbdev intel nouveau radeon radeonsi vesa dummy v4l" XTABLES_ADDONS="quota2 psd pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
Unset:  CC, CPPFLAGS, CTARGET, CXX, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LANG, LC_ALL, LINGUAS, MAKEOPTS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

gentoo / gentoo-docker-images

setuptools and certifi block eachother/circular dependency #79