Cargo Features

secrets has no features set by default.

[dependencies]
secrets = { version = "1.2.0", features = ["allow-coredumps", "use-libsodium-sys"] }
allow-coredumps
use-libsodium-sys = libsodium-sys

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.

libsodium-sys use-libsodium-sys?