Installing nix on macOS BigSur

Installation.md

The nixos.org website suggests to use:

sh <(curl -L https://nixos.org/nix/install)

For macOS on Intel (x86_64) or Apple Silicon (arm64) based macs, we need to use

sh <(curl -L https://nixos.org/nix/install) --darwin-use-unencrypted-nix-store-volume

That's it!

Now we can use nix as usual:

nix build -L '(import <nixpkgs> {}).hello.overrideAttrs (_: { HELLO = "WORLD"; })'

or

nix-shell -p haskell.compiler.ghc882

should just work.