diff --git a/pkgs/development/python-modules/azure-mgmt-reservations/default.nix b/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
index 48a8d937294..0be05eb390f 100644
--- a/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
+++ b/pkgs/development/python-modules/azure-mgmt-reservations/default.nix
@@ -5,18 +5,20 @@
 , msrestazure
 , azure-common
 , azure-mgmt-core
-, azure-mgmt-nspkg
-, isPy3k
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "azure-mgmt-reservations";
   version = "2.0.0";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
     extension = "zip";
-    sha256 = "sha256-5vXdXiRubnzPk4uTFeNHR6rwiHSGbeUREX9eW1pqC3E=";
+    hash = "sha256-5vXdXiRubnzPk4uTFeNHR6rwiHSGbeUREX9eW1pqC3E=";
   };
 
   propagatedBuildInputs = [
@@ -24,8 +26,6 @@ buildPythonPackage rec {
     msrestazure
     azure-common
     azure-mgmt-core
-  ] ++ lib.optionals (!isPy3k) [
-    azure-mgmt-nspkg
   ];
 
   # has no tests