You can choose to run a specific version of nix CLI. Now, there are several ways to do it. You can either choose to run a specific version temporarily via nix run or pin it permanently in your home-manager, NixOS or nix-darwin configuration.
Temporarily (via nix run)
WIP
Pinning
WIP
On home-manager
WIP
On NixOS
WIP
On nix-darwin
WIP