Try cache-dir inside mount

.readthedocs.yaml

@@ -6,16 +6,17 @@ build:
     python: latest
   jobs:
     pre_create_environment:
+      - mount
+      - pwd
       - asdf plugin add uv
       - asdf install uv latest
       - asdf global uv latest
       # Turn `python -m virtualenv` into `python -c pass`
       - truncate --size 0 $( dirname $( uv python find ) )/../lib/python3*/site-packages/virtualenv/__main__.py
-      - mount
     post_create_environment:
       - uv venv $READTHEDOCS_VIRTUALENV_PATH
       # Turn `python -m pip` into `python -c pass`
       - truncate --size 0 $( ls -d $READTHEDOCS_VIRTUALENV_PATH/lib/python3* )/site-packages/pip.py
-      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH uv pip install -n --upgrade sphinx
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH uv pip install --cache-dir $READTHEDOCS_VIRTUALENV_PATH/.. --upgrade sphinx
     post_install:
-      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH uv pip install -n -r docs/requirements.txt
+      - VIRTUAL_ENV=$READTHEDOCS_VIRTUALENV_PATH uv pip install --cache-dir $READTHEDOCS_VIRTUALENV_PATH/.. -r docs/requirements.txt