anchor.diff: -{ stdenv, fetchFromGitHub, python3Packages, file, less
  +{ stdenv, lib, fetchFromGitHub, python3Packages, file, less, highlight
   , imagePreviewSupport ? true, w3m ? null}:
   
   with stdenv.lib;
  
positive.code:   '';
  
    preConfigure = ''
      substituteInPlace ranger/data/scope.sh \
        --replace "/bin/echo" "echo"
  
  
negative.code:       --replace "set preview_images false" "set preview_images true"
    '';
  
    meta =  with lib; {
      description = "File manager with minimalistic curses interface";
      homepage = http://ranger.github.io/;
      license = licenses.gpl3;
  