Attempt #12347

Author: zpostfacto

.github/workflows/build.yml

@@ -79,6 +79,12 @@ jobs:
           restore-keys: |
             vcpkg-${{ runner.os }}-${{ matrix.os-version }}-${{ matrix.crypto }}-
 
+      - name: Ensure vcpkg cache directories exist
+        run: |
+          New-Item -ItemType Directory -Path "${{ env.VCPKG_ROOT }}/downloads" -Force | Out-Null
+          New-Item -ItemType Directory -Path "${{ env.VCPKG_DEFAULT_BINARY_CACHE }}" -Force | Out-Null
+        shell: pwsh
+
       # Mark all directories as safe so checkouts performed in CMakeLists.txt don't cause "unsafe repository" errors.
       # See https://github.com/actions/checkout/issues/766
       - name: Configure Git