calculate-overlay/profiles/default/package.use/exactly-one-of

# smp? ( exactly-one-of ( kaapi tbb ) )
sci-libs/vtk tbb

# exactly-one-of ( alsa oss portaudio pulseaudio )
app-accessibility/julius -pulseaudio

# hcache? ( exactly-one-of ( berkdb gdbm lmdb qdbm tokyocabinet )
mail-client/mutt -gdbm -lmdb

# exactly-one-of ( expat xml )
media-libs/libmetalink expat

# exactly-one-of ( openssl nss gnutls )
net-fs/s3fs openssl

# exactly-one-of ( python_single_target_python2_7 python_single_target_python3_4 python_single_target_python3_5 python_single_target_python3_6 )
kde-apps/lokalize -python_single_target_python2_7

# player? ( exactly-one-of ( alsa oss openal ) )
media-sound/wildmidi -openal

# exactly-one-of ( python_single_target_python2_7 python_single_target_python3_6)
app-text/wklej -python_single_target_python2_7 -vim

# exactly-one-of ( l10n_en l10n_fr l10n_it l10n_ja l10n_nl l10n_pl )
app-doc/kicad-doc -l10n_fr -l10n_it -l10n_nl -l10n_pl

# exactly-one-of ( mysql postgres )
net-dns/mydns postgres

# exactly-one-of ( elogind systemd )
gnome-base/gdm elogind
gnome-base/gnome-control-center elogind
gnome-base/gnome-settings-daemon elogind
gnome-extra/cinnamon-session elogind

# exactly-one-of ( agent hybrid local server ) at-most-one-of ( mysql postgres )
net-analyzer/ossec-hids hybrid postgres