Use venv's pip

.gitlab-ci.yml

@@ -22,15 +22,14 @@ before_script:
 
 pypi_publish:
   before_script:
-   - pip list
-   - pip install twine
+   - pip3 list
+   - pip3 install twine
   only:
    - main
   stage: publish
   script:
-    - pip install twine
-    - python setup.py sdist bdist_wheel
-    - python -m twine upload
+    - python3 setup.py sdist bdist_wheel
+    - python3 -m twine upload
      --skip-existing
      --repository-url https://pypi.clarin-pl.eu/
      -u $PIPY_USER

tox.ini

 [tox]
-envlist = py
+envlist = py38
 
 [testenv]
 commands = pytest {posargs}
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