these 5 derivations will be built:
  /nix/store/6j5vizlqsfli33wc7fc4ilcywsif1a43-source.drv
  /nix/store/1jpq5l6zdxsc9i6hkw274jgsyads4ffn-omp-18.11.3-cargo-vendor-vendor-staging.drv
  /nix/store/9pqmaqlzd7jh0y73xdds6rzvl8xf7a74-omp-18.11.3-cargo-vendor-vendor.drv
  /nix/store/w5jq3hcssva38xxvypzp2dsd0d8fllxb-omp-18.11.3.drv
  /nix/store/yv93phhiiy0rz3lyn65kryap4fwa992m-check-omp.drv