these 5 derivations will be built:
  /nix/store/95nf4a5pkg77xqshrf3s29q9fwnwzq8g-source.drv
  /nix/store/ggbidz2vzvnjjxx3i96ahf8vfl28sh0b-omp-18.4.10-cargo-vendor-vendor-staging.drv
  /nix/store/awifcg16ifhy9p6abv33375v9h5h1b35-omp-18.4.10-cargo-vendor-vendor.drv
  /nix/store/l9d6w12yzsg5k0jh98qqzihzxkd3nqzf-omp-18.4.10.drv
  /nix/store/nmgnsz6v8lkym7dzl0vss02kahlip7h5-check-omp.drv