use cfg_aliases::cfg_aliases; fn main() { // Setup cfg aliases cfg_aliases! { // Platforms macos: { target_os = "macos" }, linux: { target_os = "linux" }, unix: { target_family = "unix" }, windows: { target_family = "windows" }, // exclusive features smb: { not( macos ) }, smb_unix: { all(unix, not(macos)) } } }