these 4 derivations will be built:
  /nix/store/mfjm4v71bzwkcqylidcp9cf6fvvjbnm7-docker-image-packages-manifest.drv
  /nix/store/r4avp1azw4zqawynwyhsqx66z4647bk1-docker-image-sources.drv
  /nix/store/88537js07sr9b10b5wr304scwqplvzq9-docker-image-inputs.drv
  /nix/store/9qp20i10ki2rm4z3s508avwsi8vkbh59-docker-image-inputs-hash.drv