these 2 derivations will be built:
  /nix/store/snhivbpx3f64vr2hfirvvyria03xh6nj-cargo-vendor-dir.drv
  /nix/store/5dqy46l7d3yzs2n21yqhyjx1m3y27n11-direnv-instant-1.3.0.drv