core/pkgs/by-name/op/openssh/packages.nix

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

with pkgs; {
  opensshPackages = dontRecurseIntoAttrs (callPackage ./. { });

  openssh = opensshPackages.openssh.override { etcDir = "/etc/ssh"; };

  openssh_hpn = opensshPackages.openssh_hpn.override { etcDir = "/etc/ssh"; };

  openssh_gssapi =
    opensshPackages.openssh_gssapi.override { etcDir = "/etc/ssh"; };

  ssh-copy-id = callPackage ./copyid.nix { };
}