anchor.diff:  { lib, stdenv
   , fetchFromGitHub
  +, fetchpatch
   , nix-update-script
   , pantheon
   , pkg-config
  
positive.code: 
  stdenv.mkDerivation rec {
    pname = "elementary-music";
    version = "5.1.0";
  
    repoName = "music";
  
  
negative.code:   meta = with lib; {
      description = "Music player and library designed for elementary OS";
      homepage = "https://github.com/elementary/music";
      license = licenses.gpl3Plus;
      platforms = platforms.linux;
      maintainers = pantheon.maintainers;
    };
  