anchor.diff:  
     outputs = [ "bin" "dev" "out" ];
   
  +  buildInputs = [ libiconv ];
     propagatedBuildInputs = [ libusb1 ];
     nativeBuildInputs = [ pkgconfig ];
   
  
positive.code:       in the form of a library suitable primarily for POSIX compliant operating
        systems. We implement MTP Basic, the stuff proposed for standardization.
        '';
      platforms = stdenv.lib.platforms.linux;
      maintainers = [ ];
    };
  }
  
negative.code: { stdenv, fetchurl, pkgconfig, libusb1, libiconv }:
  
  stdenv.mkDerivation rec {
    name = "libmtp-1.1.15";
  