FabioLolix [1] filed a orphan request for ros-lunar-opencv3 [2]: Can't be built since day one, libwebp-dev dependency don't exist, reported on comments on 2017-10-10 [1] https://aur.archlinux.org/account/FabioLolix/ [2] https://aur.archlinux.org/pkgbase/ros-lunar-opencv3/