anchor.diff:  , attrs
   , click
   , construct
  +, construct-classes
   , ecdsa
   , hidapi
   , libusb1
  
positive.code: 
    disabledTestPaths = [
      "tests/test_stellar.py" # requires stellar-sdk
    ];
  
    pythonImportsCheck = [ "trezorlib" ];
  
negative.code: 
  buildPythonPackage rec {
    pname = "trezor";
    version = "0.13.4";
  
    disabled = !isPy3k;
  
    src = fetchPypi {
      inherit pname version;
      sha256 = "04a77b44005971819386bbd55242a1004b1f88fbbdb829deb039a1e0028a4af1";
    };
  
    nativeBuildInputs = [ installShellFiles ];
  