anchor.diff: -{ stdenv, fetchurl, pkgconfig, libusb1 }:
  +{ stdenv, fetchurl, pkgconfig, libusb1, libiconv }:
   
   stdenv.mkDerivation rec {
     name = "libmtp-1.1.15";
  
positive.code: 
    outputs = [ "bin" "dev" "out" ];
  
    propagatedBuildInputs = [ libusb1 ];
    nativeBuildInputs = [ pkgconfig ];
  
  
negative.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.unix;
      maintainers = [ ];
    };
  }
  