diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index c53a172..eb8f892 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -158,6 +158,11 @@ jobs:
       - uses: msys2/setup-msys2@v2
         with:
           msystem: ${{matrix.sys}}
+          # Update so that we get a new enough compiler in the clang64
+          # environment (a version of clang that supports hidden visibility).
+          # The GCC build (in the mingw64 environment) seems to export
+          # slightly fewer symbols and doesn't hit the limit quite yet.
+          update: true
           install: >-
             git
             make