these 2 derivations will be built:
  /nix/store/abjb1n5m2zg35m6xgb8ysfycajfnhrs1-cargo-vendor-dir.drv
  /nix/store/miibblqwgc758nnay00h1iad9l7q1kzx-direnv-instant-1.3.0.drv