anchor.diff:  
   buildPythonPackage rec {
     pname = "pymatgen";
  -  version = "2022.2.7";
  +  version = "2022.3.29";
  +  format = "setuptools";
   
  -  # sdist doesn't include c files
  +  disabled = pythonOlder "3.8";
  +
     src = fetchFromGitHub {
       owner = "materialsproject";
       repo = "pymatgen";
       rev= "v${version}";
  -    sha256 = "sha256-92Dxmo1Z9LR2caSOftIf1I6jeZmqDe3SqhhoCofWraw=";
  +    hash = "sha256-B2piRWx9TfKlGTPOAAGsq2GxyfHIRBVFpk6dxES0WF0=";
     };
   
     nativeBuildInputs = [
  
positive.code: { lib, buildPythonPackage, fetchFromGitHub
  , cython
  , enum34
  , glibcLocales
  , matplotlib
  , monty
  
negative.code: , plotly
  , pybtex
  , pydispatcher
  , pythonOlder
  , requests
  , ruamel-yaml
  , scipy
  , spglib
  , sympy
  , tabulate
  