these 3 derivations will be built:
  /nix/store/0rc2ibgbyg16bp04k6wmdx5pn19r2yln-dsh-source.drv
  /nix/store/x9fqmika8ja6ak5myq0l3bvbkmif88w9-dsh-0.2.2-rc.2.drv
  /nix/store/kcvy31bni2662mi2aiyyy8ldlklv9a9f-check-dsh.drv