diff --git a/.github/workflows/bors.yml b/.github/workflows/bors.yml
index ab08c167f1026..c8e6b8e061738 100644
--- a/.github/workflows/bors.yml
+++ b/.github/workflows/bors.yml
@@ -223,7 +223,11 @@ jobs:
   build_channels_macos:
     name: Build Channels macOS
     needs: macos
-    runs-on: macos-12
+    # FIXME: Use macOS 11 for now as CI failed with a linker error on macOS 12 image:
+    # ld: in /.../x86_64-apple-darwin/lib/libstd-a4729905.rlib(rust.metadata.bin),
+    # archive member 'rust.metadata.bin' with length 2958149 is not mach-o or llvm bitcode file '/.../x86_64-apple-darwin/lib/libstd-a4729905.rlib'
+    # Possibly related: https://github.com/actions/runner-images/issues/6350
+    runs-on: macos-11
     env:
       OS: macos
     strategy: