anchor.diff:  { lib
   , stdenv
   , fetchFromGitLab
  +, python3
   , pkg-config
   , which
   , makeWrapper
  
positive.code:     lame
      flac
      vorbis-tools
    ];
  
    configureFlags = [
  
negative.code:     pkg-config
      which
      makeWrapper
      python3
    ];
  
    buildInputs = [
  