attempt at repairing github workflow

.github/workflows/check.yml

@@ -19,21 +19,48 @@ jobs:
       - name: Check out GitHub repository ${{ github.repository }}
         uses: actions/checkout@v4
 
-      - name: Install Poetry
-        run: pip install poetry==1.8.3
-
-      - name: Set up Python on ${{ runner.os }}
-        uses: actions/setup-python@v5
-        id: setup_python
+      - name: Cache Poetry dependencies
+        uses: actions/cache@v4
         with:
-          python-version: '3.10'
-          cache: 'poetry'
+          path: |
+            ~/.cache/pypoetry/cache
+            ~/.cache/pypoetry/artifacts
+          key: poetry-${{ runner.os }}-${{ hashFiles('poetry.lock') }}
+          restore-keys: |
+            poetry-${{ runner.os }}-
+
+      - name: Create virtual environment
+        run: python -m venv venv
+
+      - name: Activate virtual environment and install Poetry
+        run: |
+          source venv/bin/activate
+          pip install poetry==1.8.3 --break-system-packages
+
+      - name: Install dependencies with Poetry
+        run: |
+          source venv/bin/activate
+          poetry install --with dev
+
+      - name: Run your tests
+        run: |
+          source venv/bin/activate
+          poetry run your-test-command
+
+      - name: Create virtual environment
+        run: python -m venv venv
 
-      - name: Install dependencies on Python ${{ steps.setup_python.outputs.python-version }}
-        run: poetry install --with dev
+      - name: Activate virtual environment and install Poetry
+        run: |
+          source venv/bin/activate
+          pip install poetry==1.8.3
 
       - name: Check and fix with Ruff
-        run: poetry run ruff check ./tests/*.py ./openseries/*.py --fix --exit-non-zero-on-fix
+        run: |
+          source venv/bin/activate
+          poetry run ruff check ./tests/*.py ./openseries/*.py --fix --exit-non-zero-on-fix
 
       - name: Type check with Mypy
-        run: poetry run mypy .
+        run: |
+          source venv/bin/activate
+          poetry run mypy .