[INFO] fetching crate fixedstep 0.3.0...
[ERROR] this task or one of its parent failed!
[ERROR] HTTP status server error (500 Internal Server Error) for url (https://static.crates.io/crates/fixedstep/fixedstep-0.3.0.crate)
[ERROR] note: run with `RUST_BACKTRACE=1` to display a backtrace.