use std::env; fn main() { // We just forward the DEP_IMGUI_THIRD_PARTY variable here because the // main function outside the build script does not actually see it let cimgui_include_path = env::var_os("DEP_IMGUI_THIRD_PARTY").expect("DEP_IMGUI_THIRD_PARTY not defined"); println!( "cargo:rustc-env=DEP_IMGUI_THIRD_PARTY={}", cimgui_include_path .to_str() .expect("Could not turn cimgui include path to string") ); }