anchor.diff:      runHook 'postCheck'
     '';
   
  -  doInstallCheck = true;
  -
     installCheckPhase = ''
       runHook 'preInstallCheck'
   
  
positive.code: 
  in buildPythonPackage rec {
    name = "beets-${version}";
    version = "1.3.16";
    namePrefix = "";
  
    src = fetchFromGitHub {
      owner = "sampsyo";
      repo = "beets";
      rev = "v${version}";
      sha256 = "1grjcgr419yq756wwxjpzyfjdf8n51bg6i0agm465lb7l3jgqy6k";
    };
  
    patches = [
      (fetchTritonPatch {
  
negative.code: 
      runHook 'postInstallCheck'
    '';
  
    doCheck = true;
    doInstallCheck = true;
  
    meta = with stdenv.lib; {
      description = "Music tagger and library organizer";
  