Cargo Features

rocket-include-static-resources has no features set by default.

[dependencies]
rocket-include-static-resources = { version = "0.10.5", features = ["cache"] }
cache = rocket-cache-response

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.

rocket-cache-response cache?