Cargo Features

versian has no features set by default.

[dependencies]
versian = { version = "0.1.0", features = ["cmp"] }
cmp = rust-apt

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.

rust-apt cmp?

Enables rust-apt ^0.5.1