anchor.diff: -{ lib, fetchPypi, buildPythonPackage
  -, fetchpatch, configobj, six, traitsui
  -, pytestCheckHook, tables, pandas
  -, pythonOlder, importlib-resources
  +{ lib
  +, buildPythonPackage
  +, configobj
  +, fetchpatch
  +, fetchPypi
  +, importlib-resources
  +, pandas
  +, pytestCheckHook
  +, pythonAtLeast
  +, pythonOlder
  +, tables
  +, traits
  +, traitsui
   }:
   
   buildPythonPackage rec {
     pname = "apptools";
     version = "5.1.0";
  +  format = "setuptools";
  +
  +  disabled = pythonOlder "3.7";
   
     src = fetchPypi {
       inherit pname version;
  
positive.code:     export HOME=$TMP
    '';
  
    meta = with lib; {
      description = "Set of packages that Enthought has found useful in creating a number of applications.";
      homepage = "https://github.com/enthought/apptools";
      maintainers = with maintainers; [ knedlsepp ];
      license = licenses.bsdOriginal;
    };
  }
  
negative.code: 
    propagatedBuildInputs = [
      configobj
      traits
      traitsui
    ] ++ lib.optionals (pythonOlder "3.9") [
      importlib-resources
  