Cargo Features

Ultraman has no features set by default.

[dependencies]
ultraman = { version = "0.3.2", features = ["man"] }
man = roff

Required by the man binary

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.

roff man?

Enables roff

https://doc.rust-lang.org/nightly/cargo/reference/specifying-dependencies.html?highlight=git,version#multiple-locations