these 4 derivations will be built:
  /nix/store/bqcy88k1qphsrh5khjxcadqz32hl321r-source.drv
  /nix/store/qixb0wjbxk408pd25sxxpxacx34l40ba-omp-17.4.2-cargo-vendor-vendor-staging.drv
  /nix/store/887jxxqhckzkacq114398dpkl6q991ik-omp-17.4.2-cargo-vendor-vendor.drv
  /nix/store/c9vycsakg3dfgb69v2m62q2f365qpxdb-omp-17.4.2.drv