anchor.diff:  , astropy
   , astropy-extension-helpers
   , astropy-healpix
  -, astropy-helpers
   , buildPythonPackage
   , cython
   , fetchPypi
  
positive.code:     pytestCheckHook
    ];
  
    preCheck = ''
      cd build/lib*
    '';
  
    pythonImportsCheck = [
      "reproject"
  
negative.code: 
    nativeBuildInputs = [
      astropy-extension-helpers
      cython
      setuptools-scm
    ];
  