Cargo Features

include-dir-macro has no features set by default.

[dependencies]
include-dir-macro = { version = "0.2.0", features = ["web"] }
web = rocket, tree_magic

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 web?

Enables rocket ^0.4

tree_magic web?