Update rules_python to latest 1.8.4 for tensorflow and xla. Doing so would enable us to use latest feature which includes a venv layout. This latest version also introduce stricter hermeticity which was first introduce in 1.7.0 as seen in logs:

Update rules_python to latest 1.8.4 for tensorflow and xla. Doing so would enable us to use latest feature which includes a venv layout. This latest version also introduce stricter hermeticity which was first introduce in 1.7.0 as seen in logs: #131785