these 5 derivations will be built:
  /nix/store/wvcs5nwk12mss4acwdlssaf4if2r07zc-source.drv
  /nix/store/lqkdxisgk4z163bxyx1is8cf30d1pi8c-omp-18.13.2-cargo-vendor-vendor-staging.drv
  /nix/store/5yjvh52d73dylyf6kgcninji5l0irxh7-omp-18.13.2-cargo-vendor-vendor.drv
  /nix/store/f91ji6b03jz3cpakhcgi2x8mlyg1r3wy-omp-18.13.2.drv
  /nix/store/2crbbv1g32r8nsnx9rzyx5dmd8dg5r3w-check-omp.drv