MarsSeed [1] filed a deletion request for ghc8.6-bin [2]: Unneeded legacy ghc version from 2017, with python2 based check(). Only the broken, abandoned cardano-addresses from 2021 depends on it, whose newer version works with newer ghc. [1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/ghc8.6-bin/