these 5 derivations will be built:
  /nix/store/a137wp048188xdpyiil5rqdw3bavfvdj-source.drv
  /nix/store/h4qrz013z4pw24pai8gjq4ad7ayvl1fn-omp-18.11.3-cargo-vendor-vendor-staging.drv
  /nix/store/xxm9c92xs5vq9z1h9apb42rx9idjv9h9-omp-18.11.3-cargo-vendor-vendor.drv
  /nix/store/np33bjyc34ykspa75fbbaff4rx8qzj6d-omp-18.11.3.drv
  /nix/store/s4s7pim5hhqqql9z7zply488xqa6ba2b-check-omp.drv