I deleted /nix and started a fresh install of nix, however after installing nix install nix (MACBook Pro M1 arm64 BigSur) with sh <(curl -L https://nixos.org/nix/install) I run $ nix but I get the output zsh: command not found: nix , same for nix-shellalso the /nix volume is not created, I also tried the instruction at https://docs.plutus-community.com/docs/setup/MacOS.html still same issue