these 4 derivations will be built:
  /nix/store/hs1w3bfw20aqs5l2dacbfc4i04f345wf-Cargo.toml.drv
  /nix/store/2gazi5a0cbhf9rxvkpnmmdw8lv7icljv-source.drv
  /nix/store/s3a0kfwiamhphvbsgzpya6y52r2nwfyp-tribuchet-deps-0.1.0.drv
  /nix/store/xm35604k18sg62dxrkc28fcvyh4ic843-tribuchet-0.1.0.drv