Cargo Features

tokio-dl-stream-to-disk has no features set by default.

tokio-dl-stream-to-disk = { version = "1.0.1", features = ["sha256sum"] }
sha256sum = sha2

Features from optional dependencies

In crates that don't use the dep: syntax, optional dependencies automatically become Cargo features. These features may have been created by mistake, and this functionality may be removed in the future.

sha2 sha256sum?