diff --git a/.github/workflows/linux-nightly.yml b/.github/workflows/linux-nightly.yml
index d192469a9..1610697d8 100644
--- a/.github/workflows/linux-nightly.yml
+++ b/.github/workflows/linux-nightly.yml
@@ -194,7 +194,7 @@ jobs:
     - name: Test haddock generation
       shell: bash
       run: |
-        time stack $ARGS build --haddock --no-haddock-deps --no-haddock-hyperlink-source --haddock-arguments="--no-print-missing-docs"
+        time stack $ARGS build --fast --haddock --no-haddock-deps --no-haddock-hyperlink-source --haddock-arguments="--no-print-missing-docs"
       # --no-haddock-hyperlink-source is 25% faster
       # --no-print-missing-docs is 600% quieter
       env: