these 5 derivations will be built:
  /nix/store/6kil55fn86fdrckvs6x1f4gwiijcxz18-source.drv
  /nix/store/8dip5xacsds74qqw44ac118754sp2kgn-omp-18.2.10-cargo-vendor-vendor-staging.drv
  /nix/store/1np20qcdxnkzjk71hxb8nx5z490i2wx7-omp-18.2.10-cargo-vendor-vendor.drv
  /nix/store/sfbq61z7k2jj6n9wymlpd347l1gm15hm-omp-18.2.10.drv
  /nix/store/5cr84hzncf6q3i6hp36w1awicmmv3yq0-check-omp.drv