Rust's support for FreeBSD was bumped to 12.0 in https://github.com/rust-lang/rust/issues/89058#issuecomment-1441529961 The standard library changed to unconditionally using `getrandom(2)` on freebsd: https://github.com/rust-lang/rust/pull/107159