anchor.diff:  , xorg
   }:
   
  -assert xorg != null ->
  -  xorg.libX11 != null
  -  && xorg.libXft != null
  +assert libx11 != null ->
  +  xorg.libXft != null
     && xorg.libXrender != null;
   
   let
  
positive.code:     xorg.libXft
      xorg.libXrender
    ];
  
    postPatch = /* FIXME: Fixed in >1.40.7 */ ''
      sed -i pango/meson.build \
        -e 's/symbols_prefix/symbol_prefix/g'
    '' +  /* FIXME: Files are missing from 1.40.7 release for some reason */ ''
      cat > pango/pango-features.h.meson <<EOF
      #ifndef PANGO_FEATURES_H
      #define PANGO_FEATURES_H
  
      #mesondefine PANGO_VERSION_MAJOR
      #mesondefine PANGO_VERSION_MINOR
      #mesondefine PANGO_VERSION_MICRO
  
      #define PANGO_VERSION_STRING "@PANGO_VERSION_MAJOR@.@PANGO_VERSION_MINOR@.@PANGO_VERSION_MICRO@"
  
      #endif /* PANGO_FEATURES_H */
      EOF
  
      for i in {1..9}; do
        touch tests/markups/{fail,valid}-$i.{expected,markup}
      done
    '';
  
    mesonFlags = [
      "-Denable_docs=false"  # gtk-doc
  
negative.code:     optionalString;
  
    versionMajor = "1.40";
    versionMinor = "9";
    version = "${versionMajor}.${versionMinor}";
  in
  stdenv.mkDerivation rec {
  