MarsSeed [1] filed a deletion request for ros-melodic-velodyne- description [2]:
Unbuildable orphan from 2021: BitBucket source repo requires HTTP authentication (username and password). [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ros-melodic-velodyne-description/
