diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index e81135d5cc..5dbfcf0c3b 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -112,6 +112,11 @@ jobs:
           fetch-depth: 0
           submodules: recursive
 
+      # The Command Line Tools linker always matches its own SDK.
+      - name: "Use the Command Line Tools toolchain"
+        if: matrix.platform == 'macos'
+        run: sudo xcode-select -s /Library/Developer/CommandLineTools
+
       - name: Install dependencies
         run: brew install cmake ninja