oech3 [1] filed a deletion request for rust-nightly-bin [2]: Orphan and older than https://archlinux.org/packages/extra/x86_64/rust/ for long time. rustup is also usable as alternative.
[1] https://aur.archlinux.org/account/oech3/ [2] https://aur.archlinux.org/pkgbase/rust-nightly-bin/
