atom-shell 0.19.2 : fails to build

[aegypius]

[982/982] LINK atom
FAILED: /usr/bin/clang++ -Wl,-O1 -Wl,--as-needed -rpath \$ORIGIN -rdynamic -pthread -o atom -Wl,--start-group obj/atom/app/atom.atom_main.o obj/libatom_lib.a obj/vendor/brightray/libbrightray.a obj/vendor/node/libnode_lib.a obj/vendor/nod
e/deps/openssl/libopenssl.a obj/vendor/node/deps/zlib/libchrome_zlib.a obj/vendor/node/deps/http_parser/libhttp_parser.a obj/vendor/node/deps/cares/libcares.a obj/vendor/node/deps/uv/libuv.a obj/vendor/breakpad/libbreakpad_client.a  -Wl,-
-end-group -ldbus-1 -lX11 -lXrandr -lXext -lgconf-2 -lglib-2.0 /var/tmp/portage/dev-util/atom-shell-0.19.2/work/atom-shell-0.19.2/vendor/brightray/vendor/download/libchromiumcontent/Release/libchromiumcontent.so /var/tmp/portage/dev-util/
atom-shell-0.19.2/work/atom-shell-0.19.2/vendor/brightray/vendor/download/libchromiumcontent/Release/libchromiumviews.a -lpthread -lgtk-x11-2.0 -lgdk-x11-2.0 -lpangocairo-1.0 -latk-1.0 -lcairo -lpangoft2-1.0 -lpango-1.0 -lfreetype -lfontc
onfig -lnotify -lgdk_pixbuf-2.0 -lgio-2.0 -lgobject-2.0 -lm -ldl -lrt
/usr/bin/x86_64-pc-linux-gnu-ld: /var/tmp/portage/dev-util/atom-shell-0.19.2/work/atom-shell-0.19.2/vendor/brightray/vendor/download/libchromiumcontent/Release/libchromiumviews.a(gtk2ui.gconf_listener.o): undefined reference to symbol 'gc
onf_entry_get_value'