diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2436af7..fe61171 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -64,6 +64,17 @@
 - adds new lint: `use_decorated_box`.
 - improves docs for `omit_local_variable_types`.
 
+## 2.15.1 - 2021-12-14
+
+This is a patch release that fixes:
+
+- an AOT compilation failure in some Flutter apps (issue [#47878][]).
+- `dart pub publish` for servers with a path in the URL (pr
+  [dart-lang/pub#3244][]).
+
+[#47878]: https://github.com/dart-lang/sdk/issues/47878
+[dart-lang/pub#3244]: https://github.com/dart-lang/pub/pull/3244
+
 ## 2.15.0 - 2021-12-08
 
 ### Language
diff --git a/tools/VERSION b/tools/VERSION
index 2ecb71f..640defa 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 16
 PATCH 0
-PRERELEASE 108
+PRERELEASE 109
 PRERELEASE_PATCH 0
\ No newline at end of file
diff --git a/tools/bots/flutter/compile_flutter.sh b/tools/bots/flutter/compile_flutter.sh
index 511855c..35d271f 100755
--- a/tools/bots/flutter/compile_flutter.sh
+++ b/tools/bots/flutter/compile_flutter.sh
@@ -73,6 +73,7 @@
 pushd src
 git clone --single-branch --depth=1 -vv \
     https://dart.googlesource.com/external/github.com/flutter/engine flutter
+mkdir -p third_party
 pushd third_party
 ln -s $checkout dart
 popd  # third_party