these 5 derivations will be built:
  /nix/store/mlb74386plvj5dcyf94r6lrq7nlswc3l-source.drv
  /nix/store/j51mpgcaq5m7sn0937w2psvlqq5pbbdk-omp-18.11.3-cargo-vendor-vendor-staging.drv
  /nix/store/iwyqzvp0niac90ssjfig408x1db1wcgl-omp-18.11.3-cargo-vendor-vendor.drv
  /nix/store/qgqgmrxp6ha29wwllfy3xi2ajdpxwm2p-omp-18.11.3.drv
  /nix/store/g0bf8wd76amqi5d214kjbxzkr70s1w5x-check-omp.drv