these 5 derivations will be built:
  /nix/store/k1qk0vhjppm7vcd9qxmaqx2xkyilmn6l-source.drv
  /nix/store/7fm82rangif793wsr7cc9rzzbiin1q0v-omp-18.11.2-cargo-vendor-vendor-staging.drv
  /nix/store/7pjzhzjsan4cwps0y761vsmhz993n545-omp-18.11.2-cargo-vendor-vendor.drv
  /nix/store/792fs2qcbl7ln9sm5d6vl7lbcal0wn89-omp-18.11.2.drv
  /nix/store/fvmqxxaw3la323vfikgx22wqiid2h2g1-check-omp.drv