diff --git a/tools/jdk/BUILD b/tools/jdk/BUILD
index 0bd8db3..cbfe203 100644
--- a/tools/jdk/BUILD
+++ b/tools/jdk/BUILD
@@ -81,6 +81,12 @@
     actual = "@local_jdk//:extdir",
 )
 
+# TODO(cushon): migrate to extclasspath and delete
+alias(
+    name = "extdir",
+    actual = "@local_jdk//:extdir",
+)
+
 filegroup(
     name = "langtools",
     srcs = ["//third_party/java/jdk/langtools:javac_jar"],