Error on build about tune HOT 2 CLOSED

uninstalled cargo and rust from Synaptic and cleaned up with sudo apt autoremove

installed rust and cargo via curl https://sh.rustup.rs -sSf | sh

and is building now

from tune.

Thanks for documenting and explaining the fix. I prefer not to include this explanation in the README.md for the following reasons:

• This issue already explains well what to do and will help others.
• Using the packaged rustc is what most Rustlings get "wrong" (how should they know?) at the beginning. It's not limited to this repo.
• Even the packaged rustc will support edition2021 in the future. edition2021 uses clear error messages about the minimal required rustc version.

from tune.