gff-derive is a procedural macro. It will run at compile time and transform your program's source code.
Adding gff-derive macro(s) as a dependency
Run this command in a terminal, in your project's directory:
cargo add gff-derive
To add it manually, edit your project's Cargo.toml file and add to the [dependencies] section:
gff-derive = "0.1.0"
You may need to import the macro(s) with use gff_derive::*.
gff_derive documentation.