anchor.diff:      optionalString;
   
     versionMajor = "1.40";
  -  versionMinor = "7";
  +  versionMinor = "9";
     version = "${versionMajor}.${versionMinor}";
   in
   stdenv.mkDerivation rec {
  
positive.code:   src = fetchurl {
      url = "mirror://gnome/sources/pango/${versionMajor}/${name}.tar.xz";
      hashOutput = false;
      sha256 = "517645c00c4554e82c0631e836659504d3fd3699c564c633fccfdfd37574e278";
    };
  
    nativeBuildInputs = [
  
negative.code:     xorg.libXft
      xorg.libXrender
    ];
  
    mesonFlags = [
      "-Denable_docs=false"  # gtk-doc
  