Give up installing packages system-wide in GH Actions

.github/workflows/cicd.yml

@@ -29,12 +29,10 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install Poetry
       uses: snok/install-poetry@2bf112a0f6979928eb6b011f39700db589c5961e  # v1.3.1
-      with:
-        virtualenvs-create: false
     - name: Install Python dependencies
       run: |
         poetry install --no-interaction --no-root
-        python -m nltk.downloader punkt
+        poetry run python -m nltk.downloader punkt
         # Selectively install the optional dependencies for some Python versions
         # Install the optional neural network dependencies (TensorFlow and LMDB)
         # - except for one Python version (3.9) so that we can test also without them
@@ -48,7 +46,7 @@ jobs:
         if [[ ${{ matrix.python-version }} == '3.9' ]]; then
           poetry install -E spacy
           # download the small English pretrained spaCy model needed by spacy analyzer
-          python -m spacy download en_core_web_sm --upgrade-strategy only-if-needed
+          poetry run python -m spacy download en_core_web_sm --upgrade-strategy only-if-needed
         fi
         # For Python 3.8
         # - voikko and pycld3 dependencies
@@ -57,9 +55,9 @@ jobs:
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names
-        flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
+        poetry run flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
         # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
-        flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
+        poetry run flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     - name: Test with pytest
       run: |
         poetry run pytest --cov=./ --cov-report xml