"media-libs/sdl-mixer" has unmet requirements

HI FOLKS

after eix-sync and “emerge -avuDN world” i got this error:

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

Calculating dependencies... done!                                                                                                                                                                                    

!!! The ebuild selected to satisfy "media-libs/sdl-mixer" has unmet requirements.                                                                                                                                    
- media-libs/sdl-mixer-1.2.12-r3::gentoo USE="flac mad mikmod mp3 vorbis wav -fluidsynth -midi -mod -modplug -playtools -smpeg -static-libs -timidity" ABI_X86="64"

  The following REQUIRED_USE flag constraints are unsatisfied:
    mikmod? ( mod )

  The above constraints are a subset of the following complete expression:
    midi? ( any-of ( timidity fluidsynth ) ) timidity? ( midi ) fluidsynth? ( midi ) mp3? ( any-of ( smpeg mad ) ) smpeg? ( mp3 ) mad? ( mp3 ) mod? ( any-of ( mikmod modplug ) ) mikmod? ( mod ) modplug? ( mod )

(dependency required by "media-tv/xbmc-13.2[sdl]" [installed])
(dependency required by "@selected" [set])
(dependency required by "@world" [argument])

after that i add to “/etc/portage/package.use/custom” this line:

media-libs/sdl-mixer mod

now after doing “emerge -avuDN world”, i got alot of USE flags to be changed in 20 packages:

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

Calculating dependencies... done!
[binary   R    ] dev-libs/boost-1.52.0-r7:0/1.52  USE="nls threads -debug -doc -icu -mpi -python* -static-libs -tools" PYTHON_TARGETS="python2_7 (-python3_2) -python3_3" 7,670 kB
[binary   R    ] dev-libs/libgcrypt-1.5.4:0/11  USE="-static-libs*" 415 kB
[binary   R    ] sys-apps/pciutils-3.2.0  USE="kmod zlib* -static-libs" 133 kB
[binary   R    ] net-nds/openldap-2.4.38-r2  USE="berkdb crypt ipv6 samba ssl syslog tcpd -cxx -debug -experimental -gnutls* -icu -iodbc -kerberos -minimal -odbc -overlays -perl -sasl (-selinux) -slp -smbkrb5passwd" ABI_X86="(64) (-32) (-x32)" 2,667 kB
[binary   R    ] dev-db/sqlite-3.8.4.3:3  USE="readline -debug -doc -icu -secure-delete* -static-libs -tcl {-test}" ABI_X86="(64) (-32) (-x32)" 510 kB
[binary   R    ] media-libs/mesa-10.0.4  USE="classic egl gallium gbm llvm nptl vdpau xvmc -bindist -debug -gles1 -gles2* -llvm-shared-libs -opencl -openvg -osmesa -pax_kernel -pic -r600-llvm-compiler (-selinux) -wayland -xa" ABI_X86="(64) (-32) (-x32)" VIDEO_CARDS="i915 i965 intel nouveau r100 r200 r300 r600 radeon vmware (-freedreno) -ilo -radeonsi" 64,629 kB
[binary   R    ] x11-libs/cairo-1.12.16  USE="X glib opengl svg (-aqua) -debug -directfb -doc (-drm) (-gallium) (-gles2) -legacy-drivers -openvg (-qt4) -static-libs -valgrind -xcb* -xlib-xcb" 1,151 kB
[binary   R    ] x11-base/xorg-server-1.15.0:0/1.15.0  USE="ipv6 nptl suid udev xorg -dmx -doc -kdrive* -minimal (-selinux) -static-libs -tslib -unwind -xnest -xvfb" 2,847 kB
[binary   R    ] media-gfx/sane-backends-1.0.24-r3  USE="gphoto2 ipv6 usb v4l* -avahi -doc -snmp -systemd -threads* -xinetd" SANE_BACKENDS="abaton agfafocus apple artec artec_eplus48u as6e avision bh canon canon630u canon_dr cardscan coolscan coolscan2 coolscan3 dc210 dc240 dc25 dell1600n_net dmc epjitsu epson epson2 fujitsu genesys gt68xx hp hp3500 hp3900 hp4200 hp5400 hp5590 hpljm1005 hs2p ibm kodak kodakaio kvs1025 kvs20xx leo lexmark ma1509 magicolor matsushita microtek microtek2 mustek mustek_usb nec net niash p5 pie pixma plustek plustek_pp qcam ricoh rts8891 s9036 sceptre sharp sm3600 sm3840 snapscan sp15c st400 stv680 tamarack teco1 teco2 teco3 {test} u12 umax umax1220u umax_pp xerox_mfp -canon_pp -hpsj5s -kvs40xx -mustek_pp -mustek_usb2 -pnm" 3,853 kB
[binary   R    ] x11-drivers/xf86-video-intel-2.21.15  USE="dri sna udev uxa* xvmc -glamor" 1,206 kB
[binary   R    ] net-print/cups-1.7.5  USE="X acl dbus pam ssl threads usb -debug -gnutls* -java -kerberos -lprng-compat -python (-selinux) -static-libs -systemd -xinetd -zeroconf" ABI_X86="(64) (-32) (-x32)" LINGUAS="ca es fr it ja pt_BR ru" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" 7,460 kB
[binary   R    ] media-gfx/ufraw-0.19.2  USE="gtk openmp -contrast -fits -gimp* -gnome -timezone" 798 kB
[binary   R    ] media-libs/libsdl-1.2.15-r4  USE="X alsa joystick opengl pulseaudio sound video xinerama xv -aalib -custom-cflags* -dga -directfb -fbcon -ggi -libcaca -nas -oss (-ps3) -static-libs (-svga) -tslib" 490 kB
[binary   R    ] media-video/ffmpeg-1.2.6-r1  USE="3dnow 3dnowext X aac alsa amr bzip2 cpudetection encode faac hardcoded-tables iconv ieee1394 jpeg2k mmx mmxext mp3 network openal pulseaudio sdl speex ssse3 theora truetype v4l vaapi vdpau vorbis x264 xvid zlib -aacplus (-altivec) -avx -bindist -bluray -cdio (-celt) -debug -doc -examples -fdk -flite -fontconfig -frei0r -gnutls -gsm -iec61883 -jack -libass -libcaca -libsoxr -libv4l -modplug (-neon) -openssl -opus* -oss -pic -rtmp -schroedinger -static-libs {-test} -threads* -twolame (-vis) -vpx" ABI_X86="(64) (-32) (-x32)" FFTOOLS="aviocat cws2fws ffescape ffeval fourcc2pixfmt graph2dot ismindex pktdumper qt-faststart trasher" 5,593 kB
[binary   R    ] virtual/ffmpeg-9-r1  USE="X encode jpeg2k mp3 sdl speex theora truetype vaapi vdpau x264 -gsm -opus -threads*" ABI_X86="(64) (-32) (-x32)" 18 kB
[binary   R    ] media-video/mplayer-1.2_pre20130729  USE="3dnow 3dnowext X a52 alsa bidi cddb cdio cdparanoia cpudetection dv dvd dvdnav enca encode faac ftp gif iconv ipv6 jpeg jpeg2k libass lzo mad mmx mmxext mng mp3 network openal opengl osdmenu png pulseaudio samba sdl shm speex sse sse2 ssse3 tga theora truetype unicode v4l vdpau vorbis x264 xanim xinerama xscreensaver xv xvid xvmc -aalib (-altivec) (-aqua) -bindist -bl -bluray -bs2b -debug -dga* -directfb -doc -dts* -dvb -faad -fbcon -ggi -gsm -jack -joystick -ladspa -libcaca -libmpeg2 -lirc -live -md5sum* -nas -nut -oss -pnm -pvr -radio* -rar -rtc -rtmp (-selinux) -toolame -tremor -twolame (-vidix) -zoran" VIDEO_CARDS="mga -s3virge -tdfx" 2,773 kB
[binary   R    ] media-gfx/gimp-2.8.14:2  USE="alsa bzip2 dbus exif jpeg jpeg2k mmx mng pdf png smp sse svg tiff udev* wmf xpm -aalib (-altivec) (-aqua) -curl -debug -doc -gnome -lcms -postscript -python -webkit" LINGUAS="bg de es fr it pl pt pt_BR ro ru uk -am -ar -ast -az -be -br -ca -ca@valencia -cs -csb -da -dz -el -en_CA -en_GB -eo -et -eu -fa -fi -ga -gl -gu -he -hi -hr -hu -id -is -ja -ka -kk -km -kn -ko -lt -lv -mk -ml -ms -my -nb -nds -ne -nl -nn -oc -pa -rw -si -sk -sl -sr -sr@latin -sv -ta -te -th -tr -tt -vi -xh -yi -zh_CN -zh_HK -zh_TW" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" 12,680 kB
[binary   R    ] www-client/chromium-37.0.2062.120  USE="cups (pic) pulseaudio tcmalloc* -bindist -custom-cflags -gnome -gnome-keyring -kerberos (-neon) (-selinux) {-test}" LINGUAS="bg de es fr it pl pt_BR pt_PT ro ru uk -am -ar -bn -ca -cs -da -el -en_GB -es_LA -et -fa -fi -fil -gu -he -hi -hr -hu -id -ja -kn -ko -lt -lv -ml -mr -ms -nb -nl -sk -sl -sr -sv -sw -ta -te -th -tr -vi -zh_CN -zh_TW" 44,974 kB
[binary   R    ] net-print/hplip-3.14.6  USE="fax hpcups hpijs kde libnotify policykit scanner snmp -X -doc -libusb0 -minimal -parport -qt4 -static-ppds*" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" 12,857 kB
[binary   R    ] media-libs/mlt-0.9.0  USE="dv ffmpeg gtk kde kdenlive melt mmx qt4 quicktime sdl sse sse2 vdpau vorbis xml -compressed-lumas -debug -frei0r* -jack -libsamplerate -lua -python -rtaudio -ruby -xine" 3,141 kB

Total: 20 packages (20 reinstalls, 20 binaries), Size of downloads: 175,855 kB

Would you like to merge these packages? [Yes/No]

my output of “emerge --info” is:

Portage 2.2.8-r1 (!../../var/lib/layman/distros/profiles/CLD/amd64, gcc-4.7.3, glibc-2.19-r1, 3.14.17-calculate x86_64)
=================================================================
System uname: Linux-3.14.17-calculate-x86_64-Pentium-R-_Dual-Core_CPU_E5300_@_2.60GHz-with-gentoo-14
KiB Mem:     4047408 total,    146096 free
KiB Swap:          0 total,         0 free
Timestamp of tree: Fri, 19 Sep 2014 11:00:01 +0000
ld GNU ld (GNU Binutils) 2.23.2
app-shells/bash:          4.2_p45
dev-lang/python:          2.7.7
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:       2.69
sys-devel/automake:       1.11.6, 1.12.6, 1.13.4
sys-devel/binutils:       2.23.2
sys-devel/gcc:            4.7.3-r1
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4.2-r1
sys-devel/make:           3.82-r4
sys-kernel/linux-headers: 3.13 (virtual/os-headers)
sys-libs/glibc:           2.19-r1::calculate
Repositories: gentoo distros calculate gentoo-zh
Installed sets: @custom
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="*"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-O2 -march=native -pipe"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc /usr/share/config /usr/share/gnupg/qualified.txt /usr/share/themes/oxygen-gtk/gtk-2.0 /usr/share/themes/oxygen-gtk/gtk-3.0"
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"
CXXFLAGS="-O2 -march=native -pipe"
DISTDIR="/var/calculate/remote/distfiles"
EMERGE_DEFAULT_OPTS=" --binpkg-respect-use=y --quiet-build=n --with-bdeps=y"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs config-protect-if-modified distlocks ebuild-locks fixlafiles getbinpkg merge-sync news parallel-fetch parallel-install preserve-libs protect-owned sandbox sfperms strict unknown-features-warn unmerge-logs unmerge-orphans userfetch usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://distfiles.gentoo.org"
LANG="fr_FR.UTF-8"
LDFLAGS="-Wl,--as-needed"
MAKEOPTS="-j3"
PKGDIR="/var/calculate/remote/packages/CLD/x86_64"
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/calculate/tmp"
PORTDIR="/usr/portage"
PORTDIR_OVERLAY="/var/lib/layman/distros /var/lib/layman/calculate /var/lib/layman/gentoo-zh"
USE="3dnow 3dnowext X a52 aac acl acpi alsa amd64 amr audiofile avi berkdb bittorrent bluetooth bzip2 cairo cdda cddb cdparanoia cdr chm cli consolekit cpudetection cracklib crypt css cue cups cxx dbus djvu dri dv dvd dvdr dvdread ebook encode exif faac ffmpeg flac flash foomaticdb fortran ftp gd gdbm gif gphoto2 gpm gtk iconv id3tag ieee1394 imagemagick ios ipod ipv6 irc jabber jingle jpeg jpeg2k kde libnotify libwww logrotate lzo mad matroska mbox mikmod mmx mmxext mng modules mp3 mpeg mplayer multilib musepack ncurses networkmanager nfs nls nptl nsplugin ogg oggvorbis openal opencore-amr openexr opengl openmp oscar pam pcre pdf png policykit portaudio ppp pulseaudio qt3support qt4 quicktime raw rdesktop readline real samba scanner sdl semantic-desktop session smp speex spell srt sse sse2 sse3 sse4.1 sse4.2 sse4a sse5 ssl ssse3 svg tcpd tga theora tiff truetype udev unicode usb userlocales v4l v4l2 vaapi vcd vdpau vhosts vorbis wavpack webkit wimax win32codecs wmf wxwindows x264 xanim xcomposite xinerama xpm xv xvid xvmc yahoo 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" CL="builder client desktop console consolegui" COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" DRACUT_MODULES="dmraid dmsquash-live plymouth lvm mdraid nfs" ELIBC="glibc" FOO2ZJS_DEVICES="*" 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" GRUB_PLATFORMS="efi-64 efi-32 pc" INPUT_DEVICES="keyboard mouse evdev mutouch synaptics" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console presenter-minimizer" LINGUAS="en bg de es fr it pl pt pt_BR ro ru ru_RU uk" LIRC_DEVICES="serial" OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-5" PYTHON_SINGLE_TARGET="python2_7" PYTHON_TARGETS="python2_7" RUBY_TARGETS="ruby20" THEMES="CLD" USERLAND="GNU" VIDEO_CARDS="fbdev glint intel mach64 mga nouveau nv r128 radeon savage sis tdfx trident vesa via vmware nouveau nvidia i915 i965 r100 r200 r300 r600 radeonhd 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"
USE_PYTHON="2.7"
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, LC_ALL, PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OPTS, SYNC

are all those changes normal ?
Thanks