MarsSeed [1] filed a deletion request for gurobi81 [2]: EOL version from 6 years ago (2018). Depends on python37 that is EOL since a year ago and has unfixed breaking issues as reported on its AUR page. Not useful to keep this package. AUR carries the latest gurobi package.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/gurobi81/
