anchor.diff:  
   buildPythonPackage rec {
     pname = "einops";
  -  version = "0.3.2";
  +  version = "0.4.1";
   
     src = fetchFromGitHub {
       owner = "arogozhnikov";
       repo = pname;
       rev = "v${version}";
  -    sha256 = "0ix094cfh6w4bvx6ymp5dpm35y9nkaibcn1y50g6kwdp4f0473y8";
  +    hash = "sha256-n4R4lcRimuOncisCTs2zJWPlqZ+W2yPkvkWAnx4R91s=";
     };
   
     checkInputs = [
  
positive.code: , nbconvert
  , jupyter
  , chainer
  , pytorch
  , mxnet
  , tensorflow
  
negative.code:     jupyter
      # For backend tests
      chainer
      parameterized
      pytorch
      mxnet
      tensorflow
  