use old command

.github/workflows/haddock.yml

@@ -33,7 +33,13 @@ jobs:
     - name: Build Haddock
       shell: bash
       run: |
-        stack haddock --haddock-arguments="--odir docs"
+        shopt -s globstar && \
+        stack exec haddock -- ./src/**/*.hs \
+          $(for m in src/**/Internal/*.hs; do echo -n " --hide  $m" | sed -r -e 's|/|.|g' -e 's|.src.||' -e 's|.hs||'; done) \
+          --html --pretty-html --hyperlinked-source --quickjump \
+          --title="IOTasks" \
+          --prologue=haddock/prologue \
+          --odir docs
 
     - name: Upload artifact
       uses: actions/upload-pages-artifact@v2