Jack1221 [1] filed a deletion request for ftcfrcsimulator [2]: this package is replaced by xrcsimulator. Upstream changed name and sites 2 years ago. It is confusing to those searching for xrcsimulator [1] https://aur.archlinux.org/account/Jack1221/ [2] https://aur.archlinux.org/pkgbase/ftcfrcsimulator/