MarsSeed [1] filed an orphan request for msc-generator [2]: Flagged for broken build since 2022-09-16. It is also outdated, as upstream's most recent release is from 4 months ago.
[1] https://aur.archlinux.org/account/MarsSeed/ [2] https://aur.archlinux.org/pkgbase/msc-generator/
