К примеру:
[I] media-video/ffmpegthumbnailer
Available versions: 2.0.8{tbz2} {gnome gtk jpeg png}
Installed versions: 2.0.8{tbz2}(08:57:56 AM 01/27/2014)(gtk jpeg png -gnome)
Homepage: http://code.google.com/p/ffmpegthumbnailer/
Description: Lightweight video thumbnailer that can be used by file managers
!!! existing preserved libs:
>>> package: media-video/ffmpeg-1.2.5
* - /usr/lib64/libavutil.so.51
* - /usr/lib64/libavutil.so.51.73.101
* used by /usr/lib64/libffmpegthumbnailer.so.4.0.8 (media-video/ffmpegthumbnailer-2.0.8)
* used by /usr/lib64/libsox.so.2.0.1 (media-sound/sox-14.4.1)
Use emerge @preserved-rebuild to rebuild packages using these libraries
emerge @preserved-rebuild действия не возымел, пакет всё равно ставится бинарный. emerge -1 тоже не помог