Cargo Features

[dependencies]
jq-sys = { version = "0.2.2", default-features = false, features = ["bundled", "pkg-config"] }
default = pkg-config

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

bundled = jq-src

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.

jq-src build bundled?
pkg-config build default