The cargo xtask qemu command fails because it internally calls cargo osrun, but cargo-osrun is not a built‑in subcommand and cannot be installed from crates.io — and the anticipated source repository https://github.com/arceos-org/ostool.git does not exist (returns a 404), making it impossible to obtain the required helper and blocking the entire quick‑start flow.
The cargo xtask qemu command fails because it internally calls cargo osrun, but cargo-osrun is not a built‑in subcommand and cannot be installed from crates.io — and the anticipated source repository https://github.com/arceos-org/ostool.git does not exist (returns a 404), making it impossible to obtain the required helper and blocking the entire quick‑start flow.