diff --git a/.gitea/workflows/build-pdf.yml b/.gitea/workflows/build-pdf.yml
index 6535b91..136f967 100644
--- a/.gitea/workflows/build-pdf.yml
+++ b/.gitea/workflows/build-pdf.yml
@@ -34,15 +34,13 @@ jobs:
       - name: Compile changed root files
         if: steps.changed.outputs.roots != ''
         uses: docker://texlive/texlive:latest
-        run: |
-          mkdir -p pdf aux
-          for f in ${{ steps.changed.outputs.roots }}; do
-            echo "== Building $f =="
-            latexmk -pdf -interaction=nonstopmode -halt-on-error \
-              -outdir=pdf -auxdir=aux "$f"
-          done
-          # keep pdf/ containing only pdfs
-          find pdf -type f ! -name '*.pdf' -delete
+        with:
+          entrypoint: sh
+          args: >-
+            -c "mkdir -p pdf aux && for f in ${{ steps.changed.outputs.roots }}; do
+            echo Building $f;
+            latexmk -pdf -interaction=nonstopmode -halt-on-error -outdir=pdf -auxdir=aux \"$f\" || exit 1;
+            done && find pdf -type f ! -name '*.pdf' -delete"
 
       - name: Upload built PDFs
         if: steps.changed.outputs.roots != ''