anchor.diff:    preCheck = ''
       export PATH=$out/bin:$PATH
     '';
  +
     checkInputs = [
       pytestCheckHook
       coreutils
  
positive.code: buildPythonPackage rec {
    pname = "pyp";
    version = "1.0.0";
  
    src = fetchFromGitHub {
      owner = "hauntsaninja";
  
negative.code:     bc
    ];
  
    pythonImportsCheck = [
      "pyp"
    ];
  
    meta = with lib; {
      description = "Easily run Python at the shell! Magical, but never mysterious";
      homepage = "https://github.com/hauntsaninja/pyp";
      license = licenses.mit;
      maintainers = with maintainers; [ rmcgibbo ];
  