Cargo Features

ff-zeroize has no features set by default.

[dependencies]
ff-zeroize = { version = "0.6.3", features = ["derive"] }
derive = ff_derive-zeroize

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.

ff_derive-zeroize derive?