these 4 derivations will be built:
  /nix/store/mkchsxvl2ny05cm5jrwpmlics8xmym8l-Cargo.toml.drv
  /nix/store/nykqgi1jzwwihdnvf6l15k1b8drphm76-source.drv
  /nix/store/nz4s1pvbinnixvwdjm9hna630l15gwjw-harmonia-deps-3.2.0.drv
  /nix/store/s7ba6aqf477533k5ijy8zlw80mzhkbiv-harmonia-clippy-3.2.0.drv