diff --git a/pdk/BUILD b/pdk/BUILD
index 6913f02e..b8d5fffd 100644
--- a/pdk/BUILD
+++ b/pdk/BUILD
@@ -11,3 +11,5 @@
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.
+
+exports_files(["build_defs.bzl"])