MarsSeed [1] filed a deletion request for python-typecheck-decorator [2]: Python 3.3-3.5 typecheck addon; last released in 2016. [a] Build fails due to undeclared setuptools makedepend. I recommend deletion, seems not useful to keep, and nothing depends on it. [a]: https://pypi.org/project/typecheck-decorator/ [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/python-typecheck-decorator/