anchor.diff: -{ lib
  +{ stdenv
  +, lib
   , buildPythonPackage
   , fetchFromGitHub
   , numpy
  
positive.code:     export HOME=$(mktemp -d)
    '';
  
    checkPhase = ''
      pytest sunpy -k "not test_rotation"
    '';
  
    meta = with lib; {
  
negative.code: 
  buildPythonPackage rec {
    pname = "sunpy";
    version = "1.0.6";
    disabled = pythonOlder "3.6";
  
    src = fetchFromGitHub {
      owner = "sunpy";
      repo = pname;
      rev = "v${version}";
      sha256 = "0j2yfhfxgi95rig8cfp9lvszb7694gq90jvs0xrb472hwnzgh2sk";
    };
  
    propagatedBuildInputs = [
  