diff --git a/.github/workflows/haskell.yml b/.github/workflows/haskell.yml
index 9692f630..4789302c 100644
--- a/.github/workflows/haskell.yml
+++ b/.github/workflows/haskell.yml
@@ -43,15 +43,14 @@ jobs:
           # Instead, add only -Werror
           stack-arguments: --ghc-options -Werror
 
+          cache-prefix: "2023-06-03"
+
       - name: "Haddock: build"
-        # Not sure why it’s not $(stack path --local-doc-root) but the generated
-        # directory isn’t right, reproducible locally. Haddock reports
-        # a different one at the end of its run, and *that* is where the
-        # documentation is.
         run: |
+          stack haddock --fast --test --no-run-tests --only-dependencies
           stack haddock --fast --test --no-run-tests --no-haddock-deps
-          echo "haddock_files=$(stack path --local-install-root)/doc/" >> "$GITHUB_ENV"
-          echo "stack path --local-install-root: $(stack path --local-install-root)"
+          echo "haddock_files=$(stack path --local-doc-root)/" >> "$GITHUB_ENV"
+          echo "stack path --local-doc-root: $(stack path --local-doc-root)"
 
       - name: "Haddock: package"
         uses: actions/upload-pages-artifact@v1 # This will automatically upload an artifact from the '/_site' directory