these 2 derivations will be built:
  /nix/store/s1j4a2s5kkyzcyl1vnvk69192sgs6xgm-cargo-vendor-dir.drv
  /nix/store/72c0jbmdchv4dcv8vsr3hb8kp4a6c37d-horae-clippy-0.1.0.drv