Fix packaging for PyPI

.github/workflows/ci.yml

@@ -50,10 +50,11 @@ jobs:
         uses: actions/setup-python@v5
       - name: Build packages
         run: |
-          pip install wheel -r requirements.txt
+          python -m venv .venv
+          .venv/bin/pip install wheel -r requirements.txt
           sed -i "s/\(version='[0-9]*\.[0-9]*\.[0-9]*\)\('\)/\1.dev$(date +%Y%m%d%H%M%S)\2/g" setup.py
           sed -i "s/5 - Production\/Stable/4 - Beta/g" setup.py
-          python setup.py clean check sdist bdist_wheel
+          .venv/bin/python setup.py clean check sdist bdist_wheel
       - name: Upload to PyPI Test
         uses: pypa/[email protected]
         with:
@@ -72,8 +73,9 @@ jobs:
         uses: actions/setup-python@v5
       - name: Build packages
         run: |
-          pip install wheel -r requirements.txt
-          python setup.py clean check sdist bdist_wheel
+          python -m venv .venv
+          .venv/bin/pip install wheel -r requirements.txt
+          .venv/bin/python setup.py clean check sdist bdist_wheel
       - name: Upload to PyPI
         uses: pypa/[email protected]
         with: