these 5 derivations will be built:
  /nix/store/4zbqazm8iij3xdh8ffd6qj3jak6swzjv-source.drv
  /nix/store/ax0jpv42a6sabp2wzrzbhpm32f9nfr2n-omp-18.10.0-cargo-vendor-vendor-staging.drv
  /nix/store/2ryvm7wcbrx2z220fv6cp2s53i0hkj5b-omp-18.10.0-cargo-vendor-vendor.drv
  /nix/store/qnh233npbh8in7fk62a1cb6dqrdprk3a-omp-18.10.0.drv
  /nix/store/knj8ia3ijjnjk80nvyxghzh3mvh7xspq-check-omp.drv