Gem::Specification.new do |s| s.name = "custom_name" s.version = "0.1.0" s.summary = "A Rust extension for Ruby" s.extensions = ["Cargo.toml"] s.authors = ["Ian Ker-Seymer"] s.files = ["Cargo.toml", "Cargo.lock", "src/lib.rs"] s.metadata["cargo_crate_name"] = "custom-name-ext" end