umireon [1] filed an orphan request for backward-cpp [2]: The current version of backward-cpp needs patch to build on Arch Linux now, and this workaround is suggested on the comments, but the maintainer had not responded for a long time and this package is left unbuildable. [1] https://aur.archlinux.org/account/umireon/ [2] https://aur.archlinux.org/pkgbase/backward-cpp/