diff --git a/DEPS b/DEPS
index 98612c1617c..440ef9ca525 100644
--- a/DEPS
+++ b/DEPS
@@ -124,6 +124,7 @@ vars = {
   "benchmark_harness_rev": "7d0d28e7946702db34ae121543774f60bf8cf03c",
   "boolean_selector_rev": "f255921c7155da2167e8c96e04e527180787aafb",
   "browser_launcher_rev": "1f69393d63a2f8d36d00b86cdd20df70c347af82",
+  "characters_rev": "7633a16a22c626e19ca750223237396315268a06",
   "cli_util_rev": "44118e35e55c75f84fbc5ead051424ee1e73e406",
   "clock_rev": "1e75f08d3428bcd6f4b7cf70e788f24fc9b661e1",
   "collection_rev": "91afde43f488eef618454b896301c6ff59af72e0",
@@ -364,6 +365,12 @@ deps = {
       "@" + Var("boolean_selector_rev"),
   Var("dart_root") + "/third_party/pkg/browser_launcher":
       Var("dart_git") + "browser_launcher.git" + "@" + Var("browser_launcher_rev"),
+  Var("dart_root") + "/third_party/pkg/characters": {
+    # Contact athom@ or ensure that license requirements are met before using
+    # this dependency in other parts of the Dart SDK.
+    "url": Var("dart_git") + "characters.git" + "@" + Var("characters_rev"),
+    "condition": "checkout_flute",
+  },
   Var("dart_root") + "/third_party/pkg/cli_util":
       Var("dart_git") + "cli_util.git" + "@" + Var("cli_util_rev"),
   Var("dart_root") + "/third_party/pkg/clock":
diff --git a/tools/generate_package_config.dart b/tools/generate_package_config.dart
index 9004caace4a..b1b8f303e52 100644
--- a/tools/generate_package_config.dart
+++ b/tools/generate_package_config.dart
@@ -14,9 +14,13 @@ import 'dart:io';
 final repoRoot = dirname(dirname(fromUri(Platform.script)));
 
 void main(List<String> args) {
+  final fluteExists =
+      Directory(join(repoRoot, platform('third_party/flute'))).existsSync();
+
   var packageDirs = [
     ...listSubdirectories(platform('pkg')),
     ...listSubdirectories(platform('third_party/pkg')),
+    if (fluteExists) ...listSubdirectories(platform('third_party/flute')),
     platform('pkg/vm_service/test/test_package'),
     platform(
         'runtime/observatory_2/tests/service_2/observatory_test_package_2'),