these 3 derivations will be built:
  /nix/store/dqiijv4s427xdhjg7h0f81vbzyp0a31b-uv-build-0.12.13.drv
  /nix/store/gq5xyqx2jkymjxz7s86pbab1w5jridhj-example-0.1.0.drv
  /nix/store/dl3n88n88gcs57an3wd54x2l63z7vspl-example-venv.drv