tox.ini: Reject broken filelock 3.15.0

.github/workflows/lint.yml

@@ -28,14 +28,12 @@ jobs:
         GH_TOKEN: ${{ github.token }}
         SAGE_CI_FIXES_FROM_REPOSITORIES: ${{ vars.SAGE_CI_FIXES_FROM_REPOSITORIES }}
 
-    - name: Set up Python
-      uses: actions/setup-python@v5
-      with:
-        python-version: 3.9
-
-    - name: Install dependencies
+    - name: Install test prerequisites
       id: deps
-      run: pip install tox
+      # From docker.yml
+      run: |
+        sudo DEBIAN_FRONTEND=noninteractive apt-get update
+        sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
 
     - name: Code style check with ruff-minimal
       if: (success() || failure()) && steps.deps.outcome == 'success'

src/tox.ini

@@ -30,6 +30,7 @@ requires =
     # Because of https://github.com/tox-dev/tox/issues/3238, need <4.14.1
     tox>=3.18
     tox<4.14.1
+    filelock!=3.15.0
 
 [sagedirect]
 # Base for tox environments that bypass the virtual environment set up by tox,

tox.ini

@@ -133,6 +133,7 @@ requires =
     # Because of https://github.com/tox-dev/tox/issues/3238, need <4.14.1
     tox>=4.2.7
     tox<4.14.1
+    filelock!=3.15.0
 
 skipsdist = true