The rustup-toolbox container image is used with Toolbox as a development environment that combines a Fedora base image with rustup.
$ toolbox create -i quay.io/owtaylor/rustup-toolbox:35 RS_F35
$ toolbox enter RS_F35
# Workaround for https://github.com/containers/crun/issues/644
⬢$ sudo chown -R $USER:$USER /rustup /cargo
# Use rustup/cargo/...
⬢$ rustup component add rls
Source
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https://github.com/owtaylor/rustup-toolbox