anchor.diff:      repo   = "pytorch";
       rev    = "v${version}";
       fetchSubmodules = true;
  -    sha256 = "12d5vqqaprk0igmih7fwa65ldmaawgijxl58h6dnw660wysc132j";
  +    sha256 = "1cr8h47jxgfar5bamyvlayvqymnb2qvp7rr0ka2d2d4rdldf9lrp";
     };
   
     preConfigure = lib.optionalString cudaSupport ''
  
positive.code:   ] ++ lib.optional (pythonOlder "3.5") typing;
  
    checkPhase = ''
      ${cudaStubEnv}python test/run_test.py --exclude distributed
    '';
  
    meta = {
  
negative.code:     "LD_LIBRARY_PATH=${cudaStub}\${LD_LIBRARY_PATH:+:$LD_LIBRARY_PATH} ";
  
  in buildPythonPackage rec {
    version = "0.4.1";
    pname = "pytorch";
  
    src = fetchFromGitHub {
  