Use uv pip --system

.github/workflows/build.yaml

@@ -31,24 +31,20 @@ jobs:
       - name: Install debian packages
         run: sudo apt-get install graphviz
 
-      - name: Set the VIRTUAL_ENV variable for uv to work
-        run: |
-          echo "VIRTUAL_ENV=${Python_ROOT_DIR}" >> $GITHUB_ENV
-
       - name: Install uv
         run: |
           python -m pip install --upgrade pip
           pip install uv
 
       # We have two cores so we can speed up the testing with xdist
       - name: Install xdist and openfiles
-        run: uv pip install pytest-xdist pytest-cov
+        run: uv pip install --system pytest-xdist pytest-cov
 
       - name: Install dependencies
-        run: uv pip install -r requirements.txt
+        run: uv pip install --system -r requirements.txt
 
       - name: Build and install
-        run: uv pip install -v --no-deps -e .
+        run: uv pip install --system -v --no-deps -e .
 
       - name: Run tests
         run: pytest -r a -v -n 3 --cov=astro_metadata_translator --cov=tests --cov-report=xml --cov-report=term --cov-branch
@@ -60,7 +56,7 @@ jobs:
           token: ${{ secrets.CODECOV_TOKEN }}
 
       - name: Install documenteer
-        run: uv pip install -r doc/requirements.txt
+        run: uv pip install --system -r doc/requirements.txt
 
       - name: Build documentation
         if: ${{ matrix.python-version == '3.11' }}