diff --git a/chromeos/config/env/sys-libs/compiler-rt b/chromeos/config/env/sys-libs/compiler-rt
new file mode 100644
index 0000000..216c46b
--- /dev/null
+++ b/chromeos/config/env/sys-libs/compiler-rt
@@ -0,0 +1,5 @@
+# Copyright 2021 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+EGIT_MASTER="main"
diff --git a/chromeos/config/env/sys-libs/llvm-libunwind b/chromeos/config/env/sys-libs/llvm-libunwind
new file mode 100644
index 0000000..216c46b
--- /dev/null
+++ b/chromeos/config/env/sys-libs/llvm-libunwind
@@ -0,0 +1,5 @@
+# Copyright 2021 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+EGIT_MASTER="main"