these 3 derivations will be built:
  /nix/store/hdcdrh896ksg3mfxvpha7q5m21df70zl-omp-18.4.6-cargo-vendor-vendor.drv
  /nix/store/qah4dqp9cqi6iy5kx024mdr5xrf89ra4-omp-18.4.6.drv
  /nix/store/nfz82x9lq4wf9624i7wc0vxajz0g2ppd-check-omp.drv