config.nix

{ pkgs }:

{
  packageOverrides = pkgs: let self = pkgs; in with self; rec {
    gnupg = pkgs.gnupg.override { guiSupport = false; };
    readline = pkgs.readline70;

    pythonEnv = pkgs.python3.withPackages (pp: [ pp.numpy ]);

    gnu = pkgs.buildEnv {
      name = "gnu";
      paths = [
        bash-completion
        bash-interactive
        coreutils
        findutils
        gawk
        gnused
        gnugrep
        gnumake
        gnupg
        gnused
        gnutar
        less
        man
        screen
        stow
        wget
      ];
    };
  };
}