games-fps/alephone bad default use flags

[winny-]

twoflower ~ # emerge -av games-fps/alephone-infinity

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

Calculating dependencies... done!

!!! The ebuild selected to satisfy "games-fps/alephone" has unmet requirements.
- games-fps/alephone-20190331::winny USE="alsa ffmpeg mad mpeg vorbis -curl -sndfile -speex"

  The following REQUIRED_USE flag constraints are unsatisfied:
    ffmpeg? ( !mad !mpeg !vorbis ) mad? ( !ffmpeg ) mpeg? ( !ffmpeg ) vorbis? ( !ffmpeg )

  The above constraints are a subset of the following complete expression:
    ffmpeg? ( !mad !mpeg !sndfile !vorbis ) mad? ( !ffmpeg ) mpeg? ( !ffmpeg ) sndfile? ( !ffmpeg ) vorbis? ( !ffmpeg )

(dependency required by "games-fps/alephone-infinity-20190331::winny" [ebuild])
(dependency required by "games-fps/alephone-infinity" [argument])