amatwkgs [1] filed a deletion request for msbuild-stable [2]: We already have the binary package (mono-msbuild) in [community] offering version 16.6.xamarinxplat.2020.04.29.14.43. [1] https://aur.archlinux.org/account/amatwkgs/ [2] https://aur.archlinux.org/pkgbase/msbuild-stable/