these 4 derivations will be built:
  /nix/store/s9qz8iqgr60az229ygzb9qin19l6g4wc-Cargo.toml.drv
  /nix/store/r3s52ly8pglqza91kdcldbni02v2xhhl-source.drv
  /nix/store/qmq38jry8gd0bnwylzpbmmszr2l0qhbm-herdr-eternal-deps-0.1.0.drv
  /nix/store/2680jzqgkp1vpfci2hqrlng9xl42l614-herdr-eternal-clippy-0.1.0.drv