Hard coded Rust version

[mrjackwills]

Rust gets updated every 6 weeks, the current version (as of 2025-08-15) is 1.89.0.

The Zigbuild Dockerfile has ARG RUST_VERSION=1.87.0 hardcoded in it.

Is there any way to use rust:latest instead?

Edit: Actually, could it be possible to change the Dockerfile to something like this;

ARG RUST_VERSION="1.87.0"
ENV RUST_VERSION="${VERSION}"

Would that then enable one to run the following command?

docker run --rm -e RUST_VERSION="1.89.0" -v "$(pwd):/io" -w /io ghcr.io/rust-cross/cargo-zigbuild cargo zigbuild --release --target aarch64-apple-darwin