anchor.diff:  { stdenv
   , fetchurl
  +, lib
   
   # Required
   , boost
  
positive.code:     };
    };
  
    meta = with stdenv.lib; {
      description = "A flexible, powerful daemon for playing music";
      homepage = http://www.musicpd.org/;
      license = licenses.gpl2;
  
negative.code: }:
  
  let
    inherit (lib)
      boolEn
      boolString
      boolWt
  