anchor.diff:      rm -rv ofl/comfortaa/*.ttf \
         ofl/mavenpro/*.ttf \
         ofl/muli/*.ttf \
  -      ofl/oswald/*.ttf \
  -
  -    # This abomination of a font causes crashes with `libfontconfig',
  -    # It has an absurd number of symbols
  -    rm -r ofl/adobeblank/
  +      ofl/oswald/*.ttf
   
       if find . -name "*.ttf" | sed 's|.*/||' | sort | uniq -c | sort -n | grep -v '^.*1 '; then
         echo "error: duplicate font names"
  
positive.code:   '';
  
    installPhase = ''
      dest=$out/share/fonts/truetype
      find . -name '*.ttf' -exec install -m 444 -Dt $dest '{}' +
    '';
  
negative.code: stdenv.mkDerivation {
    pname = "google-fonts";
    version = "2019-07-14";
  
    outputs = [ "out" "adobeBlank" ];
  
    src = fetchFromGitHub {
      owner = "google";
  