anchor.diff: -{ stdenv, fetchPypi, buildPythonPackage, libusb1 }:
  +{ stdenv, fetchPypi, buildPythonPackage, libusb1, setuptools_scm }:
   
   buildPythonPackage rec {
     pname = "pyusb";
  
positive.code:   # No tests included
    doCheck = false;
  
    meta = with stdenv.lib; {
      description = "Python USB access module (wraps libusb 1.0)";  # can use other backends
      homepage = "https://pyusb.github.io/pyusb/";
  
negative.code:     inherit pname version;
      sha256 = "d69ed64bff0e2102da11b3f49567256867853b861178689671a163d30865c298";
    };
  
    nativeBuildInputs = [
      setuptools_scm
    ];
  
    # Fix the USB backend library lookup
    postPatch =
  