Merge pull request #12744 from teh/p3boto

Fix boto3 build for Python 3 and 2.

pkgs/top-level/python-packages.nix

@@ -2282,10 +2282,15 @@ in modules // {
     };
 
     propagatedBuildInputs = [ self.botocore
-                              self.futures_2_2
                               self.jmespath
-                            ];
-    buildInputs = [ self.docutils ];
+                            ] ++ (if isPy3k then [] else [self.futures_2_2]);
+    buildInputs = [ self.docutils self.nose self.mock ];
+
+    # Tests are failing with `botocore.exceptions.NoCredentialsError:
+    # Unable to locate credentials`. There also seems to be some mock
+    # issues (`assert_called_once` doesn't exist in mock but boto
+    # seems to think it is?).
+    doCheck = false;
 
     meta = {
       homepage = https://github.com/boto3/boto;