anchor.diff:  
     postPatch = optionalString doCheck (''
       patchShebangs test/shaping/
  -  '' + /* failing test, https://bugs.freedesktop.org/show_bug.cgi?id=89190 */ ''
  -    sed -i test/shaping/Makefile.{am,in} \
  -      -e 's|tests/arabic-fallback-shaping.tests||'
     '' + /* test fails */ ''
       sed -i test/shaping/Makefile.{am,in} \
  -      -e 's|tests/vertical.tests||'
  +      -e 's|tests/fuzzed.tests||'
     '');
   
     configureFlags = [
  
positive.code:     };
    };
  
    meta = with stdenv.lib; {
      description = "An OpenType text shaping engine";
      homepage = http://www.freedesktop.org/wiki/Software/HarfBuzz;
      license = with licenses; [
  
negative.code: }:
  
  let
    inherit (lib)
      boolEn
      boolWt
      optionals
  