python3Packages.ibm-watson: add pythonImportsCheck

pkgs/development/python-modules/ibm-watson/default.nix

@@ -10,11 +10,15 @@
 , python-dateutil
 , websocket-client
 , ibm-cloud-sdk-core
+, pythonOlder
 }:
 
 buildPythonPackage rec {
   pname = "ibm-watson";
   version = "5.3.1";
+  format = "setuptools";
+
+  disabled = pythonOlder "3.7";
 
   src = fetchFromGitHub {
     owner = "watson-developer-cloud";
@@ -23,6 +27,13 @@ buildPythonPackage rec {
     sha256 = "1x6r8j0xyi81jb0q4pzr6l7aglykrwqz8nw45clv79v33i2sgdcs";
   };
 
+  propagatedBuildInputs = [
+    requests
+    python-dateutil
+    websocket-client
+    ibm-cloud-sdk-core
+  ];
+
   checkInputs = [
     responses
     pytestCheckHook
@@ -31,18 +42,15 @@ buildPythonPackage rec {
     tox
   ];
 
-  propagatedBuildInputs = [
-    requests
-    python-dateutil
-    websocket-client
-    ibm-cloud-sdk-core
-  ];
-
   postPatch = ''
     substituteInPlace setup.py \
       --replace websocket-client==1.1.0 websocket-client>=1.1.0
   '';
 
+  pythonImportsCheck = [
+    "ibm_watson"
+  ];
+
   meta = with lib; {
     description = "Client library to use the IBM Watson Services";
     homepage = "https://github.com/watson-developer-cloud/python-sdk";