these 6 derivations will be built:
  /nix/store/0lgncixma8naz2qnfxc5cj8akvx6z0x1-source.drv
  /nix/store/7qgm9zakhnnb19l4b70a4ngxra9awaq7-ccusage-20.0.36-vendor-staging.drv
  /nix/store/klv82cbkfjyxcgfk17mmvrd7jnfhi03p-ccusage-20.0.36-vendor.drv
  /nix/store/mb6csvy5hadd6xw4ry07w56fhzqhpbjg-model_prices_and_context_window.json.drv
  /nix/store/4j4di62m0k5wji15x1s14nvkz3ddbxg6-ccusage-20.0.36.drv
  /nix/store/wg2w9ly3hvrrqynddxbbhbnqj1xg74ra-check-ccusage.drv