ENV RUST_CONFIGURE_ARGS \
--build=x86_64-unknown-linux-gnu \
--enable-full-bootstrap
-ENV SCRIPT python3 ../x.py build
+ENV SCRIPT python3 ../x.py --stage 2 build
# In general this just slows down the build and we're just a smoke test that
# a full bootstrap works in general, so there's not much need to take this