Do you run OpenSUSE & installed through this guide?
Oh no, I used Raspibolt's guide. I presume I just need to run the same command with
sudo apt install, instead?
That is correct but the default Debian Cargo package uses the old version.
https://tracker.debian.org/pkg/cargoIs this supposed to change my cargo or rust version? Because I just executed it, and I'm still with the same error during sudo make install.
It supposes to change both since it comes prepackaged.
That installation should have automatically updated your PATH environment, have you tried to restart your console?
If it still does not work, updating it should do it.
export PATH="$HOME/.cargo/bin:$PATH"