these 5 derivations will be built:
  /nix/store/1ppk23xivkz76wabar29mc094lj0b0r3-source.drv
  /nix/store/b9qcbjfa2lvnyss91xk6ka8vlan35x5s-omp-18.10.4-cargo-vendor-vendor-staging.drv
  /nix/store/3rcsnvg95s4fgdh9x23f86m1wdppk2hw-omp-18.10.4-cargo-vendor-vendor.drv
  /nix/store/6iw7pxxiqp3n7q4wc8k443rrhac5kh1k-omp-18.10.4.drv
  /nix/store/fnsb0m4rls8z6df7kp69h19lrx7225hz-check-omp.drv