more fixes

Author: dbarrosop

.github/workflows/main.yaml

@@ -84,9 +84,13 @@ jobs:
     name: Releasing to pypi
     runs-on: ubuntu-latest
     steps:
-      - name: Build package
+      - uses: actions/checkout@master
+      - name: Build
         uses: abatilo/actions-poetry@v1.5.0
         with:
+          python_version: 3.8.0
+          poetry_version: 1.0
+          working_directory: .
           args: build
       - name: Publish package
         if: github.event_name == 'push' && startsWith(github.event.ref, 'refs/tags')