MarsSeed [1] filed a deletion request for ros-noetic-stage-ros [2]: Fails to build, along with its dependency chain. Obsolete, unused package from 2020.
Not compatible with Arch Linux, only with the EOL Ubuntu 20.04 LTS. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ros-noetic-stage-ros/
