[SOLVED]Chromium (версия для разработчиков).....откуда ?

emerge --info
Portage 2.3.79 (python 3.6.9-final-0, default/linux/amd64/17.1/desktop, gcc-9.2.0, glibc-2.29-r2, 4.19.82-gentoo x86_64)
=================================================================
System uname: 
KiB Mem:    32767632 total,  23123348 free
KiB Swap:          0 total,         0 free
Timestamp of repository gentoo: Mon, 23 Dec 2019 10:00:01 +0000
Head commit of repository gentoo: 1db96ee5fe4f3fb42624d18f8664b84fe0ecdeb2
sh bash 4.4_p23-r1
ld GNU ld (Gentoo 2.32 p2) 2.32.0
app-shells/bash:          4.4_p23-r1::gentoo
dev-java/java-config:     2.2.0-r4::gentoo
dev-lang/perl:            5.30.1::gentoo
dev-lang/python:          2.7.16::gentoo, 3.6.9::gentoo
dev-util/cmake:           3.14.6::gentoo
dev-util/pkgconfig:       0.29.2::gentoo
sys-apps/baselayout:      2.6-r1::gentoo
sys-apps/openrc:          0.41.2::gentoo
sys-apps/sandbox:         2.13::gentoo
sys-devel/autoconf:       2.13-r1::gentoo, 2.69-r4::gentoo
sys-devel/automake:       1.16.1-r1::gentoo
sys-devel/binutils:       2.32-r1::gentoo
sys-devel/gcc:            8.3.0-r1::gentoo, 9.2.0-r2::gentoo
sys-devel/gcc-config:     2.1::gentoo
sys-devel/libtool:        2.4.6-r3::gentoo
sys-devel/make:           4.2.1-r4::gentoo
sys-kernel/linux-headers: 4.19::gentoo (virtual/os-headers)
sys-libs/glibc:           2.29-r2::gentoo
Repositories:

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

homoludens
    location: /usr/local/portage
    masters: gentoo

ixit
    location: /var/lib/layman/ixit
    sync-type: laymansync
    sync-uri: https://github.com/okias/ixit.git
    masters: gentoo
    priority: 50

jollheef-overlay
    location: /var/lib/layman/jollheef-overlay
    sync-type: laymansync
    sync-uri: https://github.com/jollheef/jollheef-overlay.git
    masters: gentoo
    priority: 50

steam-overlay
    location: /var/lib/layman/steam-overlay
    sync-type: laymansync
    sync-uri: https://github.com/anyc/steam-overlay.git
    masters: gentoo
    priority: 50

ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="@FREE"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -mtune=native -O2 -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc /usr/share/config /usr/share/gnupg/qualified.txt"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-march=native -mtune=native -O2 -pipe"
DISTDIR="/usr/portage/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="-march=native -mtune=native -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 sandbox sfperms sign strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
FFLAGS="-march=native -mtune=native -O2 -pipe"
GENTOO_MIRRORS="ftp://mirrors.rit.edu/gentoo/"
LANG="ru_RU.utf8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j9"
PKGDIR="/usr/portage/packages"
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="X a52 aac acl acpi alsa amd64 awesome berkdb bluetooth branding bzip2 cairo cdda cdr cli consolekit crypt cups cxx dbus dri dts dvd dvdr emboss encode exif fam flac fortran gdbm gif gpm gtk iconv icu ipv6 jpeg lcms ldap libnotify libtirpc lock mad mng mp3 mp4 mpeg multilib ncurses networkmanager nls nptl nvidia ogg opengl openmp pam pango pcre pdf perl png policykit ppds pulseaudio qt5 readline sdl seccomp session spell split-usr ssl startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xattr xcb xml xv xvid 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="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 sse4_1 sse4_2 ssse3" 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" GRUB_PLATFORMS="efi-64" INPUT_DEVICES="evdev synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" NETBEANS_MODULES="apisupport cnd groovy gsf harness ide identity j2ee java mobility nb php profiler soa visualweb webcommon websvccommon xml" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php7-2" POSTGRES_TARGETS="postgres10 postgres11" PYTHON_SINGLE_TARGET="python3_6" PYTHON_TARGETS="python2_7 python3_6" RUBY_TARGETS="ruby24 ruby25" USERLAND="GNU" VIDEO_CARDS="nvidia" XFCE_PLUGINS="clock power" 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, LC_ALL, LINGUAS, PORTAGE_BINHOST, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS

grep -ri chrom /etc/portage/
/etc/portage/package.use/zz-autounmask:# required by www-client/chromium-70.0.3538.110::gentoo
/etc/portage/package.use/zz-autounmask:# required by www-client/chromium (argument)
/etc/portage/package.use/zz-autounmask:# required by www-client/chromium-70.0.3538.110::gentoo
/etc/portage/package.use/zz-autounmask:# required by www-client/chromium (argument)
/etc/portage/package.use/custom:www-client/chromium L10N=" -l10n_am -l10n_ar -l10n_bg -l10n_bn -l10n_ca -l10n_cs -l10n_da -l10n_de -l10n_el -l10n_en-GB -l10n_es  -l10n_es-419 -l10n_et -l10n_fa -l10n_fi -l10n_fil  -l10n_fr  -l10n_gu  -l10n_he -l10n_hi -l10n_hr -l10n_hu -l10n_id -l10n_it -l10n_ja -l10n_kn -l10n_ko -l10n_lt -l10n_lv -l10n_ml -l10n_mr -l10n_ms -l10n_nb -l10n_nl -l10n_pl -l10n_pt-BR -l10n_pt-PT -l10n_ro -l10n_sk -l10n_sl -l10n_sr -l10n_sv -l10n_sw -l10n_ta  -l10n_te -l10n_th -l10n_tl -l10n_tr -l10n_uk -l10n_vi -l10n_zh-CN -l10n_zh-TW "

А варум тогда о себе пишет что сборка для разработчиков, разве такая может быть стабильной?