diff --git a/.gitea/workflows/build.yaml b/.gitea/workflows/build.yaml
index 93945b3..a7d4b19 100644
--- a/.gitea/workflows/build.yaml
+++ b/.gitea/workflows/build.yaml
@@ -6,16 +6,20 @@ jobs:
     name: build marp presentation
     runs-on: ubuntu-latest
     steps:
+      - name: checkout
+        uses: actions/checkout@v4
       - name: build html presentation
+        working-directory: ./presentation
         uses: docker://marpteam/marp-cli:latest
         with:
-          args: ./presentation/presentation.md --html --allow-local-files -o ./presentation/index.html --html --theme-set ./presentation/themes --
+          args: ./presentation.md --html --allow-local-files -o ./index.html --html --theme-set ./themes --
         env:
           MARP_USER: root:root
       - name: build pdf presentation
         uses: docker://marpteam/marp-cli:latest
+        working-directory: ./presentation
         with:
-          args: ./presentation/presentation.md --html --allow-local-files -o ./presentation/presentation.pdf --theme-set ./presentation/themes --
+          args: ./presentation.md --html --allow-local-files -o ./presentation.pdf --theme-set ./themes --
         env:
           MARP_USER: root:root
       - name: compress as zip