Cargo Features

[dependencies]
supply-chain-trust-crate-000004 = { version = "1.0.94", default-features = false, features = ["proc-macro", "span-locations", "nightly"] }
default = proc-macro

The proc-macro feature is set by default whenever supply-chain-trust-crate-000004 is added without default-features = false somewhere in the dependency tree.

proc-macro default
span-locations
nightly

supply-chain-trust-crate-000004 has 4 features without comments.