How to build ARM in CircleCI with Rust Orbs?

I am trying running the following command locally:

cargo build --release --target aarch64-unknown-linux-gnu

And when I run it in CircleCI, I got the following error:

error: toolchain 'nightly-x86_64-unknown-linux-gnu' is not installed

I am using GitHub - CircleCI-Public/rust-orb: Source for CircleCI's Rust orb right now, how can I add a target there? Should I run rustup manually?

For what it’s worth, we do that (“manually” install) and we also maintain a Docker image of Rust that we use.