core/pkgs/by-name/un/unixtools/packages.nix

{ ... }:
res: pkgs: super:

with pkgs; {
  # Unix tools
  unixtools = recurseIntoAttrs (callPackages ./unixtools.nix { });
  inherit (unixtools)
    hexdump ps logger eject umount mount wall hostname more sysctl getconf
    getent locale killall xxd watch;
}