skip conflicting poetry install

.github/workflows/integration-tests.yml

@@ -13,7 +13,7 @@ on:
       container-tag:
         description: 'Container tag'
         required: true
-        default: 'latest-dev'
+        default: 'dev'
       keep-workdirs:
         description: 'Keep working directories for debugging'
         required: false
@@ -78,7 +78,7 @@ jobs:
     runs-on: ubuntu-latest
     needs: [setup]
     container:
-      image: 890888997283.dkr.ecr.eu-north-1.amazonaws.com/pixelator:${{ github.event.inputs.container-tag || 'latest-dev' }}
+      image: 890888997283.dkr.ecr.eu-north-1.amazonaws.com/pixelator:${{ github.event.inputs.container-tag || 'dev' }}
       credentials:
         username: ${{ needs.setup.outputs.docker_username }}
         password: ${{ needs.setup.outputs.docker_password }}
@@ -91,18 +91,11 @@ jobs:
 #        test: [ "small", "single-cell", "tissue" ]
 
     steps:
-      - name: Install poetry
-        run: |
-          python -m pip install --user pipx
-          python -m pipx ensurepath
-          pipx install poetry
-          poetry self add poetry-plugin-export
-
       - name: Install dev dependencies
         working-directory: /pixelator
         run: |
           poetry export -f requirements.txt --output requirements_only_dev.txt --only dev
-          pip3 install -r requirements_only_dev.txt
+          pip install -r requirements_only_dev.txt
 
       - name: Prepare test case string
         uses: actions/github-script@v6