checking for GNOME_SHELL... yes
checking for MUTTER... yes
checking for MUTTER_WAYLAND... no
checking for GNOME_SHELL_JS... yes
checking for ST... yes
checking for SHELL_PERF_HELPER... yes
checking for SHELL_HOTPLUG_SNIFFER... yes
checking for TRAY... yes
checking for GVC... yes
checking for DESKTOP_SCHEMAS... yes
checking for CARIBOU... yes
checking for BROWSER_PLUGIN... yes
checking for bluetooth support... no
checking for CALENDAR_SERVER... yes
checking for gobject-introspection... yes
checking for fdwalk... no
checking for mallinfo... yes
checking sys/resource.h usability... yes
checking sys/resource.h presence... yes
checking for sys/resource.h... yes
checking for _NL_TIME_FIRST_WEEKDAY... yes
checking for NETWORKMANAGER... no
configure: error: Couldn't find NetworkManager.

!!! Please attach the following file when seeking support:
!!! /tmp/portage/gnome-base/gnome-shell-3.12.2/work/gnome-shell-3.12.2/config.log
 * ERROR: gnome-base/gnome-shell-3.12.2 failed (configure phase):
 *   econf failed
 *
 * Call stack:
 *          ebuild.sh, line   93:  Called src_configure
 *        environment, line 4705:  Called gnome2_src_configure '--enable-browser-plugin' '--enable-man' '--without-bluetooth' '--enable-networkmanager' '--disable-systemd' 'BROWSER_PLUGIN_DIR=/usr/lib64/nsbrowser/plugins'
 *        environment, line 2928:  Called econf '--docdir=/usr/share/doc/gnome-shell-3.12.2' '--enable-compile-warnings=minimum' '--disable-schemas-compile' '--disable-maintainer-mode' '--disable-gtk-doc' '--enable-browser-plugin' '--enable-man' '--without-bluetooth' '--enable-networkmanager' '--disable-systemd' 'BROWSER_PLUGIN_DIR=/usr/lib64/nsbrowser/plugins'
 *   phase-helpers.sh, line  526:  Called die
 * The specific snippet of code:
 *                      die "econf failed"
 *
 * If you need support, post the output of `emerge --info '=gnome-base/gnome-shell-3.12.2'`,
 * the complete build log and the output of `emerge -pqv '=gnome-base/gnome-shell-3.12.2'`.
 * The complete build log is located at '/tmp/portage/gnome-base/gnome-shell-3.12.2/temp/build.log'.
 * The ebuild environment file is located at '/tmp/portage/gnome-base/gnome-shell-3.12.2/temp/environment'.
 * Working directory: '/tmp/portage/gnome-base/gnome-shell-3.12.2/work/gnome-shell-3.12.2'
 * S: '/tmp/portage/gnome-base/gnome-shell-3.12.2/work/gnome-shell-3.12.2'

>>> Failed to emerge gnome-base/gnome-shell-3.12.2,

Phoenix ~ # eix networkmanager
[I] net-misc/networkmanager
     Available versions:  0.9.8.2-r2 0.9.8.10-r1{tbz2} **0.9.10.0-r1 {avahi bluetooth connection-sharing (+)consolekit dhclient +dhcpcd gnutls (+)introspection modemmanager ncurses +nss plugins_openconnect plugins_openswan plugins_openvpn plugins_pptp plugins_sstp plugins_vpnc policykit (+)ppp resolvconf selinux systemd teamd test upower vala (+)wext +wifi KERNEL="linux"}
     Installed versions:  0.9.8.10-r1{tbz2}(04:43:19 PM 10/19/2014)(connection-sharing consolekit dhcpcd introspection modemmanager nss policykit ppp resolvconf upower wifi -avahi -bluetooth -dhclient -gnutls -plugins_openconnect -plugins_openswan -plugins_openvpn -plugins_pptp -plugins_sstp -plugins_vpnc -systemd -test -vala -wext KERNEL="linux")
     Homepage:            https://wiki.gnome.org/Projects/NetworkManager
     Description:         Universal network configuration daemon for laptops, desktops, servers and virtualization hosts