anchor.diff:  { stdenv, lib, fetchurl, undmg }:
   
   let
  -  versionComponents = [ "2" "1" ];
  +  versionComponents = [ "3" "6" "2" "548020600" ];
     appName = "MuseScore ${builtins.head versionComponents}";
   in
   
  
positive.code:   sourceRoot = "${appName}.app";
  
    src = fetchurl {
      url =  "ftp://ftp.osuosl.org/pub/musescore/releases/MuseScore-${concatStringsSep "." (take 3 versionComponents)}/MuseScore-${version}.dmg";
      sha256 = "19xkaxlkbrhvfip6n3iw6q7463ngr6y5gfisrpjqg2xl2igyl795";
    };
  
    buildInputs = [ undmg ];
  
negative.code:   meta = with lib; {
      description = "Music notation and composition software";
      homepage = "https://musescore.org/";
      license = licenses.gpl3Only;
      platforms = platforms.darwin;
      maintainers = [];
    };
  