these 5 derivations will be built:
  /nix/store/3g5872fh8idsicgpnbm6wja266xnw0nb-source.drv
  /nix/store/n35524kv13q422f46cdg92wj2m92f7yw-omp-18.6.1-cargo-vendor-vendor-staging.drv
  /nix/store/84j1wj87hsm4cjz2zsskidxjf30xsbd5-omp-18.6.1-cargo-vendor-vendor.drv
  /nix/store/kadh712fcpdmfy13x880ca7b12cj1g2n-omp-18.6.1.drv
  /nix/store/f72zf0c6qhwisalx4ip9szcvy1v5k23x-check-omp.drv