Index: libcxx/utils/ci/run-buildbot
===================================================================
--- libcxx/utils/ci/run-buildbot
+++ libcxx/utils/ci/run-buildbot
@@ -109,7 +109,7 @@
           -DCMAKE_CXX_COMPILER=clang-cl \
           -DLIBCXX_ENABLE_FILESYSTEM=YES \
           -DCMAKE_CXX_FLAGS="-D_LIBCPP_HAS_NO_INT128" \
-          -DLIBCXX_TEST_COMPILER_FLAGS="-D_LIBCPP_HAS_NO_INT128" \
+          -DLIBCXX_TEST_COMPILER_FLAGS="-D_LIBCPP_HAS_NO_INT128 -D_LIBCPP_DISABLE_VISIBILITY_ANNOTATIONS" \
           "${@}"
 }