[gentoo-user] Building VirtualBox kernel modules failed

[Gevisz]

Tonight I have compiled a new sys-kernel/gentoo-sources
version 3.17.7 (the previous version was 3.16.5).
Everything as usual:
1) copy .config from /usr/src/linux-3.16.5-gentoo to /usr/src/linux
   that points to the /usr/src/linux-3.17.7-gentoo,
2) `cd /usr/src/linux`
3) `make oldconfig`,
4) `make && make modules_install`,
5) copy bzImage, .config and System.map to /boot,
 and, finally,
6) `emerge @module-rebuild`.

Unfortunately, the last operation, that in my case usually
recompiles kernel modules needed for VirtualBox, failed with
the message I provide below. It is very strange for me
because I do not think that those (sometimes unconscious :)
choices I made during `make oldconfig` can influence building
VirtualBox kernel modules.

>>> Install virtualbox-modules-4.2.24 into /var/tmp/portage/app-emulation/virtualbox-modules-4.2.24/image/ category app-emulation
 * Installing vboxdrv module
 * Installing vboxnetflt module
 * Installing vboxnetadp module
install: cannot stat ‘vboxnetadp.ko’: No such file or directory
!!! doins: vboxnetadp.ko does not exist
 * ERROR: app-emulation/virtualbox-modules-4.2.24::gentoo failed (install phase):
 *   doins failed
 * 
 * If you need support, post the output of `emerge --info '=app-emulation/virtualbox-modules-4.2.24::gentoo'`,
 * the complete build log and the output of `emerge -pqv '=app-emulation/virtualbox-modules-4.2.24::gentoo'`.
 * The complete build log is located at '/var/tmp/portage/app-emulation/virtualbox-modules-4.2.24/temp/build.log'.
 * The ebuild environment file is located at '/var/tmp/portage/app-emulation/virtualbox-modules-4.2.24/temp/environment'.
 * Working directory: '/var/tmp/portage/app-emulation/virtualbox-modules-4.2.24/work'
 * S: '/var/tmp/portage/app-emulation/virtualbox-modules-4.2.24/work'
 * QA Notice: file does not exist:
 * 
 * 	doins: vboxnetadp.ko does not exist

And this is the output from `emerge --info '=app-emulation/virtualbox-modules-4.2.24::gentoo'`:

Portage 2.2.14 (python 3.3.5-final-0, default/linux/amd64/13.0/desktop/gnome, gcc-4.8.3, glibc-2.19-r1, 3.16.5-gentoo x86_64)
=================================================================
                         System Settings
=================================================================
System uname: Linux-3.16.5-gentoo-x86_64-AMD_Athlon-tm-_64_X2_Dual_Core_Processor_5000+-with-gentoo-2.2
KiB Mem:     7907048 total,   7336872 free
KiB Swap:   11999228 total,  11999228 free
Timestamp of tree: Sat, 20 Dec 2014 00:45:01 +0000
ld GNU ld (Gentoo 2.24 p1.4) 2.24
app-shells/bash:          4.2_p53
dev-lang/perl:            5.18.2-r2
dev-lang/python:          2.7.7, 3.3.5-r1
dev-util/cmake:           2.8.12.2-r1
dev-util/pkgconfig:       0.28-r1
sys-apps/baselayout:      2.2
sys-apps/openrc:          0.12.4
sys-apps/sandbox:         2.6-r1
sys-devel/autoconf:       2.13, 2.69
sys-devel/automake:       1.11.6-r1, 1.13.4
sys-devel/binutils:       2.24-r3
sys-devel/gcc:            4.8.3
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4.2-r1
sys-devel/make:           4.0-r1
sys-kernel/linux-headers: 3.16 (virtual/os-headers)
sys-libs/glibc:           2.19-r1
Repositories: gentoo
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-march=native -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/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/texmf/language.dat.d /etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
CXXFLAGS="-march=native -O2 -pipe"
DISTDIR="/usr/portage/distfiles"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles merge-sync news parallel-fetch preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync webrsync-gpg"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://mirror.netcologne.de/gentoo/ http://de-mirror.org/gentoo/"
LANG="en_US.UTF-8"
LDFLAGS="-Wl,-O1 -Wl,--as-needed"
MAKEOPTS="-j3"
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"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY=""
SYNC=""
USE="X a52 aac acl acpi alsa amd64 berkdb branding bzip2 cairo cdda cdr cli colord consolekit cracklib crypt cups cxx dbus dri dts dvd dvdr eds emboss encode evo exif fam firefox flac fortran gdbm gif glamor gnome-keyring gnome-online-accounts gpm gstreamer gtk gtkstyle iconv introspection ipv6 jpeg lcms ldap libnotify libsecret mad mmx mng modules mp3 mp4 mpeg multilib nautilus ncurses nls nptl ogg opengl openmp pam pango pcre pdf png policykit ppds pulseaudio qt3support qt4 readline sdl session smp socialweb spell sse sse2 ssl startup-notification svg tcpd tiff truetype udev udisks unicode upower usb vorbis wxwidgets x264 xcb xml xv xvid zlib" ABI_X86="64" 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="kexi words flow plan sheets stage tables krita karbon braindump author" CAMERAS="ptp2" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" ELIBC="glibc" GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 rtcm104v3 sirf superstar2 timing tsip tripmate tnt ublox ubx" INPUT_DEVICES="evdev" 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="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7 python3_3" RUBY_TARGETS="ruby19 ruby20" SANE_BACKENDS="hp3500" USERLAND="GNU" VIDEO_CARDS="radeon" 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:  CPPFLAGS, CTARGET, EMERGE_DEFAULT_OPTS, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, USE_PYTHON

=================================================================
                        Package Settings
=================================================================

app-emulation/virtualbox-modules-4.2.24 was built with the following:
USE="-pax_kernel" ABI_X86="64"

Any thought?