ci: Attempting to fix TMPDIR path used by MacOS

.github/workflows/test.yml

@@ -41,15 +41,14 @@ jobs:
       matrix:
         os: [macos-latest, windows-latest]
     steps:
-      # if your project needs OpenSSL, uncomment this to fix Windows builds.
-      # it's commented out by default as the install command takes 5-10m.
-      # - run: echo "VCPKG_ROOT=$env:VCPKG_INSTALLATION_ROOT" | Out-File -FilePath $env:GITHUB_ENV -Append
-      #   if: runner.os == 'Windows'
-      # - run: vcpkg install openssl:x64-windows-static-md
-      #   if: runner.os == 'Windows'
       - name: Checkout
         uses: actions/checkout@v4
 
+      - name: Ensure TMPDIR is valid for MacOS
+        if: runner.os == 'macOS'
+        run: |
+          echo "TMPDIR=$RUNNER_TEMP" >> $GITHUB_ENV
+
       - name: Install Rust stable
         uses: dtolnay/rust-toolchain@stable