Cargo Features

[dependencies]
libzip-sys = { version = "0.1.1", default-features = false, features = ["bzip2"] }
default = bzip2-sys

The bzip2-sys feature is set by default whenever libzip-sys is added without default-features = false somewhere in the dependency tree.

bzip2 = bzip2-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.

bzip2-sys default bzip2?