diff --git a/cc/private/rules_impl/compiler_flag.bzl b/cc/private/rules_impl/compiler_flag.bzl
index 1487ccd..ef08599 100644
--- a/cc/private/rules_impl/compiler_flag.bzl
+++ b/cc/private/rules_impl/compiler_flag.bzl
@@ -28,4 +28,5 @@ compiler_flag = rule(
     toolchains = [
         "@bazel_tools//tools/cpp:toolchain_type",  # copybara-use-repo-external-label
     ],
+    incompatible_use_toolchain_transition = True,
 )
diff --git a/examples/experimental_cc_shared_library.bzl b/examples/experimental_cc_shared_library.bzl
index 6793e96..4ebc6db 100644
--- a/examples/experimental_cc_shared_library.bzl
+++ b/examples/experimental_cc_shared_library.bzl
@@ -462,6 +462,7 @@ cc_shared_library = rule(
     },
     toolchains = ["@bazel_tools//tools/cpp:toolchain_type"],  # copybara-use-repo-external-label
     fragments = ["cpp"],
+    incompatible_use_toolchain_transition = True,
 )
 
 for_testing_dont_use_check_if_target_under_path = _check_if_target_under_path