these 4 derivations will be built:
  /nix/store/dpijv97jmf0zqzcr7xxs2m5dmnyvck0g-Cargo.toml.drv
  /nix/store/19rgdrzw9irfnrdnb257k2lssx5z687g-source.drv
  /nix/store/jisvgshk0pdl98312ppxsd22ywgcyshc-harmonia-deps-3.2.0.drv
  /nix/store/siy6rl1i822hz81x393zniy74r34vmbb-harmonia-3.2.0.drv