these 3 derivations will be built:
  /nix/store/b1dynylf4qni2iiy9yhdwcpsvmriqph7-omp-18.18.9-cargo-vendor-vendor.drv
  /nix/store/cdrzqjryhm7rbi4zdkcnl5dwkg2gyxzc-omp-18.18.9.drv
  /nix/store/18grswr4lfzvxrwsi5skyhz2z588f9f1-check-omp.drv