diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 9da98e6..8117d85 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -56,7 +56,8 @@ jobs:
              boost-version: '1.80.0'}
 
           # macOS builds
-          - {os: macos-latest, compiler: clang}
+          # FIXME: Remove -Wno-deprecated flag.
+          - {os: macos-latest, compiler: clang, flags: '-Wno-deprecated'}
 
           # C++20 builds
           - {os: ubuntu-latest, compiler: gcc, version: '13',
@@ -108,7 +109,9 @@ jobs:
       - name: Install macOS dependencies
         if: startsWith(matrix.os, 'macos-')
         run: |
-          brew install ninja pkg-config boost
+          brew install boost ninja pkg-config
+          echo "CPATH=/opt/homebrew/include" >> ${GITHUB_ENV}
+          echo "LIBRARY_PATH=/opt/homebrew/lib" >> ${GITHUB_ENV}
       - name: Install Boost ${{ matrix.boost-version }} from source
         if: "!startsWith(matrix.os, 'windows-') && matrix.boost-version"
         run: |