carlosal1015 [1] filed a deletion request for python2-catkin_tools [2]: Upstream is now python3 only. See https://github.com/catkin/catkin_tools/blob/master/setup.py#L87 [1] https://aur.archlinux.org/account/carlosal1015/ [2] https://aur.archlinux.org/pkgbase/python2-catkin_tools/