these 2 derivations will be built:
  /nix/store/irn5c6d6lkgs83692jykmvy2vln38dvf-omp-18.10.0.drv
  /nix/store/ys93byw6dvpl5lviddcnnls9r75xkk67-check-omp.drv
this path will be fetched (0.0 KiB download, 1.3 GiB unpacked):
  /nix/store/mwhndx9lzhig64pd8rw72j7yd3k8927v-omp-18.10.0-cargo-vendor-vendor