localhost ~ # emerge -C media-libs/gst-plugins-bad
 * This action can remove important packages! In order to be safer, use
 * `emerge -pv --depclean <atom>` to check for reverse dependencies before
 * removing packages.

--- Couldn't find 'media-libs/gst-plugins-bad' to unmerge.

>>> No packages selected for removal by unmerge
localhost ~ # emerge -C media-libs/gst-plugins-base
 * This action can remove important packages! In order to be safer, use
 * `emerge -pv --depclean <atom>` to check for reverse dependencies before
 * removing packages.

--- Couldn't find 'media-libs/gst-plugins-base' to unmerge.

>>> No packages selected for removal by unmerge