python39Packages.aioprocessing: simplify disabled, add import check

pkgs/development/python-modules/aioprocessing/default.nix

@@ -1,13 +1,13 @@
 { lib
 , buildPythonPackage
 , fetchPypi
-, pythonAtLeast
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "aioprocessing";
   version = "1.1.0";
-  disabled = !(pythonAtLeast "3.4");
+  disabled = pythonOlder "3.4";
 
   src = fetchPypi {
     inherit pname version;
@@ -17,6 +17,8 @@ buildPythonPackage rec {
   # Tests aren't included in pypi package
   doCheck = false;
 
+  pythonImportsCheck = [ "aioprocessing" ];
+
   meta = {
     description = "A library that integrates the multiprocessing module with asyncio";
     homepage = "https://github.com/dano/aioprocessing";