these 4 derivations will be built:
  /nix/store/m4gzc2zgcdv10bgcl2cd8xgr5jkzj4g8-omp-18.7.0-cargo-vendor-vendor-staging.drv
  /nix/store/xwczfaav5skyzidcdska55ffdy5hl561-omp-18.7.0-cargo-vendor-vendor.drv
  /nix/store/b3bzbpn1nhbw1r2dzpairnbh2h58ba4d-omp-18.7.0.drv
  /nix/store/pz2d063wry1qgw1mc7v7br1m66zcaag3-check-omp.drv