sekai [1] filed a orphan request for python-dugong [2]: This package is broken because the upstream repository was moved. So other packages that require python-dugong cannot be built.
Although this issue was reported last year, current maintainer has not yet noticed that. [1] https://aur.archlinux.org/account/sekai/ [2] https://aur.archlinux.org/pkgbase/python-dugong/
