these 3 derivations will be built:
  /nix/store/5nz9smw2lly2ksifpgvhpalks6qrcgl3-serde_json-1.0.154.drv
  /nix/store/hfy1y9phrr2vzn3k8zprd913xn6snq5z-cargo-vendor-dir.drv
  /nix/store/hy79chpkqn4jrgigzyl6lhl4r7dqzfb0-nix-diff-0.1.0.drv