MarsSeed [1] filed a deletion request for ros-noetic-ros [2]: Fails to build. Unused empty ROS1 build metapackage. All ROS1 packages are broken on and no longer compatible with Arch Linux.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ros-noetic-ros/
