these 3 derivations will be built:
  /nix/store/vvpmvs8c5mw8j59j1imfdhys3li0ld3a-omp-18.9.2-cargo-vendor-vendor.drv
  /nix/store/ssmjr546m4apv6j8c4gig0gr3g0y01g7-omp-18.9.2.drv
  /nix/store/2w5zrsm3fb3ylzldv59knn3z1laz27s5-check-omp.drv