these 5 derivations will be built:
  /nix/store/vyangrfmwf03kk11rdxcgfmwb942g2rn-source.drv
  /nix/store/5abgmf9v19qjj7dc2fjrncw1i4x32hn2-omp-18.4.5-cargo-vendor-vendor-staging.drv
  /nix/store/2dqd7pfwdk1ch2mss057q9rlp2afl3pl-omp-18.4.5-cargo-vendor-vendor.drv
  /nix/store/s35zjsfa6q3mxlwndck32vi0wvjz3gvc-omp-18.4.5.drv
  /nix/store/qjwh9h8h4dai4f1sw0zli9yjy92jki4a-check-omp.drv