this derivation will be built:
  /nix/store/dljriwrd8j8azkbl72yq2ffpfbdsdv7v-integration-mail-0.1.0.drv
this path will be fetched (4.6 MiB download, 19.2 MiB unpacked):
  /nix/store/4vdgh3930mh7prn5a0k9jp2pirl33d9v-himalaya-2.0.0