# rustup # The Rust toolchain installer # update rustup toolchain rustup update # install nightly build rustup install nightly # use rustc from nightly toolchain rustup run nightly rustc --version # switch to nightly installation rustup default nightly # List all available targets for the active toolchain rustup target list # Install the Android target rustup target add arm-linux-androideabi # Run a shell configured for the nightly compiler rustup run nightly bash # Show which toolchain will be used in the current directory rustup show