anchor.diff:      "--disable-coretext" # OSX
       "--enable-require-system-font-provider"
       "--${boolEn (harfbuzz_lib != null)}-harfbuzz"
  -    "--${boolEn (yasm != null)}-asm"
  +    "--${boolEn (nasm != null)}-asm"
       "--${boolEn rasterizerSupport}-rasterizer"
       "--${boolEn largeTilesSupport}-large-tiles"
     ];
  
positive.code: { stdenv
  , fetchurl
  , yasm
  
  , fontconfig
  , freetype
  
negative.code:   };
  
    nativeBuildInputs = [
      nasm
    ];
  
    buildInputs = [
  