these 5 derivations will be built:
  /nix/store/hi8l75r47b3bj36y6hxjv78a1ansr1g0-source.drv
  /nix/store/bzrghb1nb6n7vxz5rvb9mzwn6hgvakyd-omp-18.2.10-cargo-vendor-vendor-staging.drv
  /nix/store/bd3iqmdl2yb2v31sfq8kjgrk1zrcb45x-omp-18.2.10-cargo-vendor-vendor.drv
  /nix/store/60nyh4ry959wvxhyrxbhmzdbzwa8q07b-omp-18.2.10.drv
  /nix/store/nqyyrfa9wcqhdq30mnggalqy4szwh0yf-check-omp.drv