these 5 derivations will be built:
  /nix/store/6rr93xagf008kh897g6f86bznmy03sp6-source.drv
  /nix/store/jw95mmlc418ic3xv0k1fz9xvh27pkxb6-omp-18.4.9-cargo-vendor-vendor-staging.drv
  /nix/store/vj1llf1r9vm62apqnlxbq6s7g601j1qh-omp-18.4.9-cargo-vendor-vendor.drv
  /nix/store/52bwwxvjrginpz3vdmjcxq84axr8655d-omp-18.4.9.drv
  /nix/store/77r5y29fvj34jvyakz03h44sq44ld9x2-check-omp.drv