rustup-override
Modify directory toolchain overrides.
TLDR
List directiory toolchain overrides
$ rustup override list
Set the override toolchain for the current directory (i.e. tell rustup to run cargo, rustc, etc. from a specific toolchain when in that directory)
$ rustup override set [toolchain]
Remove the toolchain override for the current directory
$ rustup override unset
Remove all toolchain overrides for directories that no longer exist
$ rustup override unset --nonexistent
