I would like to note that Nix is the programming language / package manager, Nixpkgs is the primary package repository / software distribution using Nix, and NixOS is the primary Linux distribution using Nixpkgs. Nixpkgs is what has all the shell build scripts, not Nix.
Where is the pexpect link supposed to point? I don’t get linked to anything specific on a page
Ah thanks, I forgot to deploy the cross reference! Fixed.