Merge pull request #468 from gaphor/remove-pipx

.github/workflows/build.yml

@@ -51,7 +51,7 @@ jobs:
         uses: pre-commit/action@646c83fcd040023954eafda54b4db0192ce70507 # v3.0.0
       - name: Check Poetry lock file integrity
         run: |
-          pipx install --python python${{ env.python-version }} --pip-args=--constraint=.github/constraints.txt poetry
+          python${{ env.python-version }} -m pip install --constraint=.github/constraints.txt poetry
           poetry config virtualenvs.in-project true
           poetry check
 
@@ -83,8 +83,7 @@ jobs:
           allow-prereleases: true
       - name: Install Poetry
         run: |
-          python -m pip install --upgrade pip
-          pipx install --python python${{ matrix.python-version }} --pip-args=--constraint=.github/constraints.txt poetry
+          python${{ matrix.python-version }} -m pip install --constraint=.github/constraints.txt poetry
           poetry config virtualenvs.in-project true
       - name: Collect Project Data
         id: meta