Workaround externally managed environment issue in Python 3.11

.github/workflows/build.yml

@@ -43,7 +43,7 @@ jobs:
         run: |
           sudo apt -y update
           sudo apt -y install gcc libsystemd-dev
-          python -m pip install pytest sphinx
+          python -m pip install --break-system-packages pytest sphinx
 
       - name: Build (Python ${{ matrix.python }})
         run: |

.github/workflows/install.yml

@@ -66,13 +66,13 @@ jobs:
               exit 1
           esac
 
-          python3 -m pip install pytest sphinx
+          python3 -m pip install --break-system-packages pytest sphinx
 
       - name: Build & install
         shell: bash
         run: |
           set -x
-          python3 -m pip install -I -v .
+          python3 -m pip install -I -v --break-system-packages .
           # Avoid importing the systemd module from the git repository
           cd /
           python3 -c 'from systemd import journal; print(journal.__version__)'