diff --git a/third_party/BUILD b/third_party/BUILD
index 9649933aae8177..7ce8c7a007f7d0 100644
--- a/third_party/BUILD
+++ b/third_party/BUILD
@@ -333,32 +333,19 @@ java_import(
     ],
 )
 
-java_import(
+# TODO(cushon): delete
+alias(
     name = "error_prone-2.0.20-SNAPSHOT",
-    jars = [
-        "error_prone/error_prone_check_api-2.0.20-SNAPSHOT.jar",
-        "error_prone/error_prone_core-2.0.20-SNAPSHOT.jar",
-        "error_prone/error_prone_annotations-2.0.20-SNAPSHOT.jar",
-        "error_prone/error_prone_annotation-2.0.20-SNAPSHOT.jar",
-    ],
-    exports = [
-        ":auto_common",
-        ":guava",
-        ":jcip_annotations",
-        ":jsr305",
-        ":pcollections",
-        "//third_party/checker_framework_dataflow",
-        "//third_party/jformatstring",
-    ],
+    actual = ":error_prone",
 )
 
 java_import(
     name = "error_prone",
     jars = [
-        "error_prone/error_prone_check_api-2.0.19.jar",
-        "error_prone/error_prone_core-2.0.19.jar",
-        "error_prone/error_prone_annotations-2.0.19.jar",
-        "error_prone/error_prone_annotation-2.0.19.jar",
+        "error_prone/error_prone_check_api-2.0.20-SNAPSHOT.jar",
+        "error_prone/error_prone_core-2.0.20-SNAPSHOT.jar",
+        "error_prone/error_prone_annotations-2.0.20-SNAPSHOT.jar",
+        "error_prone/error_prone_annotation-2.0.20-SNAPSHOT.jar",
     ],
     exports = [
         ":auto_common",
@@ -394,7 +381,7 @@ java_import(
 
 # For bootstrapping JavaBuilder
 filegroup(
-    name = "bootstrap_guava_and_error_prone-jars-2.0.20-SNAPSHOT",
+    name = "bootstrap_guava_and_error_prone-jars",
     srcs = [
         "auto/auto-common-0.3.jar",
         "error_prone/error_prone_annotation-2.0.20-SNAPSHOT.jar",
@@ -410,21 +397,10 @@ filegroup(
     ],
 )
 
-filegroup(
-    name = "bootstrap_guava_and_error_prone-jars",
-    srcs = [
-        "auto/auto-common-0.3.jar",
-        "error_prone/error_prone_annotation-2.0.19.jar",
-        "error_prone/error_prone_annotations-2.0.19.jar",
-        "error_prone/error_prone_check_api-2.0.19.jar",
-        "error_prone/error_prone_core-2.0.19.jar",
-        "guava/guava-21.0.jar",
-        "jcip_annotations/jcip-annotations-1.0-1.jar",
-        "jsr305/jsr-305.jar",
-        "pcollections/pcollections-2.1.2.jar",
-        "//third_party/checker_framework_dataflow:bootstrap",
-        "//third_party/jformatstring:bootstrap",
-    ],
+# TODO(cushon): delete
+alias(
+    name = "bootstrap_guava_and_error_prone-jars-2.0.20-SNAPSHOT",
+    actual = "bootstrap_guava_and_error_prone-jars",
 )
 
 # As of Guava 20.0, Guava code uses Error Prone annotations. This isn't a
diff --git a/third_party/README.md b/third_party/README.md
index ff7323747a47c9..3aff82c5e214d0 100644
--- a/third_party/README.md
+++ b/third_party/README.md
@@ -97,7 +97,7 @@ a minimal set of extra dependencies.
 
 ## [Error Prone](https://github.com/google/error-prone)
 
-* Version: 2.0.19, 2.0.20-SNAPSHOT
+* Version: 2.0.20-SNAPSHOT
 * License: Apache License 2.0
 
 
@@ -166,7 +166,7 @@ a minimal set of extra dependencies.
 
 ## [javac](https://github.com/google/error-prone-javac)
 
-* Version: 9-dev-r3297-4 (javac-9-dev-r3297-4.jar), 9-dev-r4023-1 (javac-9-dev-r4023-1.jar)
+* Version: 9-dev-r4023-1 (javac-9-dev-r4023-1.jar)
 * License: GNU GPL v2 with Classpath exception (plus other licenses, see third_party/java/jdk/langtools/LICENSE file).
 
 ## [jarjar](https://code.google.com/p/jarjar/)
diff --git a/third_party/java/jdk/langtools/BUILD b/third_party/java/jdk/langtools/BUILD
index bb4070eb2ce1f5..f0f57c20fdcec8 100644
--- a/third_party/java/jdk/langtools/BUILD
+++ b/third_party/java/jdk/langtools/BUILD
@@ -19,54 +19,41 @@ filegroup(
         "//conditions:default": [
             "BUILD",
             "LICENSE",
-            "javac-9-dev-r3297-4.jar",
-            "javac-9-dev-r3297-4.srcjar",
+            "javac-9-dev-r4023-1.jar",
+            "javac-9-dev-r4023-1.srcjar",
         ],
     }),
 )
 
 java_import(
     name = "javac",
-    jars = ["javac-9-dev-r3297-4.jar"],
+    jars = ["javac-9-dev-r4023-1.jar"],
 )
 
 filegroup(
     name = "javac_jar",
     srcs = select({
         "//tools/jdk:jdk7": ["javac7.jar"],
-        "//conditions:default": ["javac-9-dev-r3297-4.jar"],
+        "//conditions:default": ["javac-9-dev-r4023-1.jar"],
     }),
 )
 
-filegroup(
+# TODO(cushon): delete
+alias(
     name = "test-srcs-9-dev-r4023-1",
-    srcs = select({
-        "//tools/jdk:jdk7": [
-            "BUILD",
-            "LICENSE",
-            "javac7.jar",
-            "javac7.srcjar",
-        ],
-        "//conditions:default": [
-            "BUILD",
-            "LICENSE",
-            "javac-9-dev-r4023-1.jar",
-            "javac-9-dev-r4023-1.srcjar",
-        ],
-    }),
+    actual = ":test-srcs",
 )
 
-java_import(
+# TODO(cushon): delete
+alias(
     name = "javac-9-dev-r4023-1",
-    jars = ["javac-9-dev-r4023-1.jar"],
+    actual = ":javac",
 )
 
-filegroup(
+# TODO(cushon): delete
+alias(
     name = "javac_jar-9-dev-r4023-1",
-    srcs = select({
-        "//tools/jdk:jdk7": ["javac7.jar"],
-        "//conditions:default": ["javac-9-dev-r4023-1.jar"],
-    }),
+    actual = ":javac_jar",
 )
 
 java_import(
diff --git a/third_party/java/jdk/langtools/javac-9-dev-r3297-4.jar b/third_party/java/jdk/langtools/javac-9-dev-r3297-4.jar
deleted file mode 100644
index 6e4ae449ed8202..00000000000000
Binary files a/third_party/java/jdk/langtools/javac-9-dev-r3297-4.jar and /dev/null differ
diff --git a/third_party/java/jdk/langtools/javac-9-dev-r3297-4.srcjar b/third_party/java/jdk/langtools/javac-9-dev-r3297-4.srcjar
deleted file mode 100644
index c2ca60349bac83..00000000000000
Binary files a/third_party/java/jdk/langtools/javac-9-dev-r3297-4.srcjar and /dev/null differ