these 5 derivations will be built:
  /nix/store/dfbs2rayyxif35vq2xq3zc5n38srsgaw-source.drv
  /nix/store/5inaaybm29vliplh0i2982n5l3rz2w1b-omp-18.4.6-cargo-vendor-vendor-staging.drv
  /nix/store/a2qimwdqd57g2c5n9r2jwmy3jw33qv94-omp-18.4.6-cargo-vendor-vendor.drv
  /nix/store/95dq8s1ayrzzh83baq4lr2q2b3y2qms5-omp-18.4.6.drv
  /nix/store/kaplwfj3chflglbk199xkw5yzph1ph07-check-omp.drv