these 5 derivations will be built:
  /nix/store/48vn5gj4pannhidbyynw95zj96rb482r-source.drv
  /nix/store/ls8bp80qr7rkdc9biqbmp7znh46a1qqj-omp-18.12.2-cargo-vendor-vendor-staging.drv
  /nix/store/36dl1qazrzgilydzijymfcimcfv9b4ay-omp-18.12.2-cargo-vendor-vendor.drv
  /nix/store/axwamsf74m1kd4vji9n8ssbxg1kc4pdq-omp-18.12.2.drv
  /nix/store/2ng0j98hjx4bpxk85i801a9h38dfgj6c-check-omp.drv