diff --git a/pkgs/development/python-modules/rx/default.nix b/pkgs/development/python-modules/rx/default.nix
index 5febbe9f9a9d..8d7277823a7b 100644
--- a/pkgs/development/python-modules/rx/default.nix
+++ b/pkgs/development/python-modules/rx/default.nix
@@ -1,16 +1,16 @@
-{ lib, fetchFromGitHub, buildPythonPackage, pythonOlder, nose }:
+{ lib, fetchPypi, buildPythonPackage, pythonOlder, nose }:
 
 buildPythonPackage rec {
   pname = "rx";
   version = "3.2.0";
   disabled = pythonOlder "3.6";
 
-  # There are no tests on the pypi source
-  src = fetchFromGitHub {
-    owner = "ReactiveX";
-    repo = "rxpy";
-    rev = "v${version}";
-    sha256 = "159ln0c721rrdz0mqyl3zvv6qsry7ql7ddlpwpnxs9q15ik15mnj";
+  # Use fetchPypi to avoid the updater script to migrate it to `reactivex` which
+  # is being developed in the same repository
+  src = fetchPypi {
+    inherit version;
+    pname = "Rx";
+    sha256 = "b657ca2b45aa485da2f7dcfd09fac2e554f7ac51ff3c2f8f2ff962ecd963d91c";
   };
 
   checkInputs = [ nose ];
@@ -20,6 +20,8 @@ buildPythonPackage rec {
   # test_new_thread_scheduler_timeout: https://hydra.nixos.org/build/74949851
   doCheck = false;
 
+  pythonImportsCheck = [ "rx" ];
+
   meta = {
     homepage = "https://github.com/ReactiveX/RxPY";
     description = "Reactive Extensions for Python";