diff --git a/.github/workflows/build-pdf.yml b/.github/workflows/build-pdf.yml
index c2b75d2..dc5e413 100644
--- a/.github/workflows/build-pdf.yml
+++ b/.github/workflows/build-pdf.yml
@@ -34,24 +34,28 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      # Step 1: Checkout the repository
+      # Checkout the repository
       - name: Checkout repository
         uses: actions/checkout@v4
         with:
           submodules: recursive
 
-      # Step 2: Pull the latest RISC-V Docs container image
+      # Pull the latest RISC-V Docs container image
       - name: Pull Container
         run: docker pull riscvintl/riscv-docs-base-container-image:latest
 
-      # Step 3: Build Files
+      # Override VERSION and REVMARK for manual workflow dispatch
+      - name: Update environment variables
+        run: |
+          echo "VERSION=v${{ github.event.inputs.version }}" >> "$GITHUB_ENV"
+          echo "REVMARK=${{ github.event.inputs.revision_mark }}" >> "$GITHUB_ENV"
+        if: github.event_name == 'workflow_dispatch'
+
+      # Build Files
       - name: Build Files
         run: make
-        env:
-          VERSION: v${{ github.event.inputs.version }}
-          REVMARK: ${{ github.event.inputs.revision_mark }}
 
-      # Step 4: Upload the built PDF files as a single artifact
+      # Upload the built PDF files as a single artifact
       - name: Upload Build Artifacts
         uses: actions/upload-artifact@v4
         with: