anchor.diff:        owner = pname;
         repo = pname;
         rev = "Release_${versionTag}";
  -      sha256 = "1k1wvzcd1yfx4nhz3iq2aaadzdk5w6sfcb4imhvm7pkbzij0nicx";
  +      sha256 = "1ycbjia223d0w9xiwk36x2vkdidsx198rzkfyxz48cbax9vvklzq";
       };
   
     unpackPhase = ''
  
positive.code:   ];
  
    hardeningDisable = [ "format" ]; # required by yaehmop
    # doCheck = false;
    dontUseSetuptoolsBuild = true;
    dontUsePipInstall = true;
    dontUseSetuptoolsCheck = true;
  
negative.code:   };
  in
  buildPythonPackage rec {
    pname = "rdkit";
    version = "2020.09.5";
  
    src =
      let
  