anchor.diff:  { stdenv
   , fetchurl
  +, lib
   }:
   
   let
  -  version = "2.4";
  +  version = "2.5";
   in
   stdenv.mkDerivation rec {
     name = "bash-completion-${version}";
  
positive.code:   src = fetchurl {
      url = "https://github.com/scop/bash-completion/releases/download/"
        + "${version}/${name}.tar.xz";
      sha256 = "c0f76b5202fec9ef8ffba82f5605025ca003f27cfd7a85115f838ba5136890f6";
    };
  
    doCheck = true;
  
negative.code:   parallelInstall = false;
    parallelCheck = false;
  
    meta = with lib; {
      description = "Programmable completion for the bash shell";
      homepage = "https://github.com/scop/bash-completion/";
      license = licenses.gpl2;
  