these 3 derivations will be built:
  /nix/store/y2mzjn18y64r9fhjcypm9z0513mc0y0v-docker-image-sources.drv
  /nix/store/s9vr0akk6m0r1v34hh4hf46cqm1hyj6l-docker-image-inputs.drv
  /nix/store/d946kprjgxxidgkyq55543zwj720mkr7-docker-image-inputs-hash.drv