these 3 derivations will be built:
  /nix/store/h17wi6d5d9gimk1n8kqvxnzc6chxya42-omp-18.4.9-cargo-vendor-vendor.drv
  /nix/store/ax17jmfbs6w69i1ygi81c9vif7dkz3a8-omp-18.4.9.drv
  /nix/store/9k8cikjmz3rqgl3670wdw8kh558aranf-check-omp.drv