Debian Stable now ships Rust 1.85 (FYI)

> \# Not available in stdlib until 1.70, but we support 1.63 to support Debian stable. > once_cell = { version = "1.19.0", default-features = false, features = ["std"] } Debian Trixie was [released](https://www.debian.org/releases/trixie/) August 9th as the new "stable" with [Rust](https://packages.debian.org/trixie/rust-all) `1.85`, so you've got more options now. 😉