these 3 derivations will be built:
  /nix/store/hvqmx8yfg5llry4q6ikilka57wissarz-omp-18.4.6-cargo-vendor-vendor.drv
  /nix/store/rnh0axg6q0r1qwizvi79izypkgs5lxvq-omp-18.4.6.drv
  /nix/store/dncfih758f86nlldvvdw7laf9lqgzzcl-check-omp.drv