these 5 derivations will be built:
  /nix/store/zwxgb4mzvcxqzrcyfjc9pa4d6py7x52n-source.drv
  /nix/store/02iq50hhi95yv2f5r2cff4ib55r5jnv3-omp-18.4.10-cargo-vendor-vendor-staging.drv
  /nix/store/k41pkbn4fr2w36jb46mhbk8r274nha8g-omp-18.4.10-cargo-vendor-vendor.drv
  /nix/store/1psnk8yfzldzpwm8lfizj9l6fhdqwl9l-omp-18.4.10.drv
  /nix/store/4q1233bd7n3in7c3caa7j7lclmwqzv8y-check-omp.drv