diff --git a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
index 8f872bb0e0..9ac55e2060 100644
--- a/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
+++ b/sdk_container/src/third_party/coreos-overlay/profiles/coreos/base/package.unmask
@@ -3,3 +3,9 @@
 # that results from the migration (python -> virtual/libcrypt ->
 # libxcrypt -> glibc -> python).
 =virtual/libcrypt-1-r1
+
+# Overwrite portage-stable mask. We haven't seen LLVM related problems
+# with rust so far, so keep using 1.70.0.
+~dev-lang/rust-1.70.0
+~dev-lang/rust-bin-1.70.0
+~virtual/rust-1.70.0