these 3 derivations will be built:
  /nix/store/mlwkllk9l6465h9kvngfksxpj4ny63fs-source.drv
  /nix/store/4y3v7qk45iykrs3ybwmikj55v8wbhyiw-herdr-eternal-deps-0.1.0.drv
  /nix/store/sxck5w8msg08bl1j901y767v20waplm0-herdr-eternal-clippy-0.1.0.drv