gh-468: fix virtualenv in testing (#471)

Author: paddyroddy

.github/workflows/test.yml

@@ -38,7 +38,7 @@ jobs:
       - name: Cache nox
         uses: actions/cache@v4
         with:
-          key: test-${{ hashFiles('pyproject.toml') }}
+          key: test-${{ hashFiles('pyproject.toml') }}-${{ env.pythonLocation }}
           path: .nox
 
       - name: Set up Python
@@ -51,6 +51,9 @@ jobs:
       - name: Install nox and coverage.py
         run: python -m pip install coverage[toml] nox
 
+      - name: Install ubuntu dependencies for fitsio
+        run: sudo apt-get install -y libbz2-dev
+
       - name: Run doctests
         run: nox -s doctests-${{ matrix.python-version }} --verbose
         env:

noxfile.py

@@ -7,8 +7,12 @@
 import nox
 
 # Options to modify nox behaviour
+nox.options.default_venv_backend = "uv|virtualenv"
 nox.options.reuse_existing_virtualenvs = True
-nox.options.sessions = ["lint", "tests"]
+nox.options.sessions = [
+    "lint",
+    "tests",
+]
 
 ALL_PYTHON = [
     "3.10",