diff --git a/.github/workflows/pull-request-verification.yml b/.github/workflows/pull-request-verification.yml
index 8b90655..26118eb 100644
--- a/.github/workflows/pull-request-verification.yml
+++ b/.github/workflows/pull-request-verification.yml
@@ -13,11 +13,21 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+      with:
+        fetch-depth: 0 # Need history for changelog generation
     - uses: volta-cli/action@v4
     - run: |
-        pnpm install
+        pnpm i
         pnpm run all
+    # We need to make sure the checked-in `index.mjs` actually matches what we expect it to be.
+    - name: Compare the expected and actual dist/ directories
+      run: |
+        if [ "$(git diff --ignore-space-at-eol dist/ | wc -l)" -gt "0" ]; then
+          echo "Detected uncommitted changes after build.  See status below:"
+          git diff
+          exit 1
+        fi
 
   test-inline:
     runs-on: ubuntu-latest