anchor.diff:  
     outputs = [ "bin" "out" "man" ];
   
  +  nativeBuildInputs = [ installShellFiles ];
  +
     postInstall =
       let
         rcloneBin =
  
positive.code: { stdenv, buildGoPackage, fetchFromGitHub, buildPackages }:
  
  buildGoPackage rec {
    pname = "rclone";
  
negative.code:         else stdenv.lib.getBin buildPackages.rclone;
      in
        ''
          installManPage $src/rclone.1
          for shell in bash zsh; do
            ${rcloneBin}/bin/rclone genautocomplete $shell rclone.$shell
            installShellCompletion rclone.$shell
          done
        '';
  
    meta = with stdenv.lib; {
  