Compilation goes OK. However: $ rustc --version rustc 1.5.0 (3d7cd77e4 2015-12-04) $ rustc hello_world.rs hello_world.rs:1:1: 1:1 error: can't find crate for `std` [E0463] hello_world.rs:1 fn main() { ^ error: aborting due to previous error $ cat hello_world.rs fn main() { println!("Hello, world!"); } TIA Jorge Almeida