diff --git a/google/cloud/bigquery/datatransfer/v1/BUILD.bazel b/google/cloud/bigquery/datatransfer/v1/BUILD.bazel
index c2f08366..327af014 100644
--- a/google/cloud/bigquery/datatransfer/v1/BUILD.bazel
+++ b/google/cloud/bigquery/datatransfer/v1/BUILD.bazel
@@ -162,7 +162,7 @@ py_gapic_library(
     name = "datatransfer_py_gapic",
     srcs = [":datatransfer_proto"],
     grpc_service_config = "bigquerydatatransfer_grpc_service_config.json",
-
+    opt_args = ["python-gapic-namespace=google.cloud", "python-gapic-name=bigquery_datatransfer"],
 )
 
 py_gapic_assembly_pkg(
diff --git a/google/cloud/bigquery/v2/BUILD.bazel b/google/cloud/bigquery/v2/BUILD.bazel
index 945e54bd..a842170d 100644
--- a/google/cloud/bigquery/v2/BUILD.bazel
+++ b/google/cloud/bigquery/v2/BUILD.bazel
@@ -144,60 +144,24 @@ go_gapic_assembly_pkg(
 ##############################################################################
 # Python
 ##############################################################################
+# This library is using Python microgenerator.
+# DO NOT OVERRIDE this Python section with autogenerated rules.
 load(
     "@com_google_googleapis_imports//:imports.bzl",
-    "moved_proto_library",
-    "py_gapic_assembly_pkg",
-    "py_gapic_library",
-    "py_grpc_library",
-    "py_proto_library",
-)
-
-moved_proto_library(
-    name = "bigquery_moved_proto",
-    srcs = [":bigquery_proto"],
-    deps = [
-        "//google/api:annotations_proto",
-        "//google/api:client_proto",
-        "//google/api:field_behavior_proto",
-        "@com_google_protobuf//:empty_proto",
-        "@com_google_protobuf//:timestamp_proto",
-        "@com_google_protobuf//:wrappers_proto",
-    ],
-)
-
-py_proto_library(
-    name = "bigquery_py_proto",
-    plugin = "@protoc_docs_plugin//:docs_plugin",
-    deps = [":bigquery_moved_proto"],
-)
-
-py_grpc_library(
-    name = "bigquery_py_grpc",
-    srcs = [":bigquery_moved_proto"],
-    deps = [":bigquery_py_proto"],
+    py_gapic_assembly_pkg = "py_gapic_assembly_pkg2",
+    py_gapic_library = "py_gapic_library2",
 )
 
 py_gapic_library(
     name = "bigquery_py_gapic",
-    src = ":bigquery_proto_with_info",
-    gapic_yaml = "bigquery_gapic.yaml",
+    srcs = [":bigquery_proto"],
     grpc_service_config = "bigquery_grpc_service_config.json",
-    package = "google.cloud.bigquery.v2",
-    service_yaml = "bigquery_v2.yaml",
-    deps = [
-        ":bigquery_py_grpc",
-        ":bigquery_py_proto",
-    ],
 )
 
-# Open Source Packages
 py_gapic_assembly_pkg(
     name = "bigquery-v2-py",
     deps = [
         ":bigquery_py_gapic",
-        ":bigquery_py_grpc",
-        ":bigquery_py_proto",
     ],
 )