these 4 derivations will be built:
  /nix/store/3j66wzpa0m45vg20q7kcr0gwa4kslphn-nix-config.json.drv
  /nix/store/1s1vdgff7vs67jn9y5riikzzvcc3civi-docker-layer-nix.drv
  /nix/store/g202c100zh2h3gxhzj3a9y5qp2silhpw-runtime-deps.drv
  /nix/store/gi6lp699x1iqgizgws9qwnlk3rrzrrz6-docker-image-nix.tar.gz.drv
these 7 paths will be fetched (1.1 MiB download, 5.5 MiB unpacked):
  /nix/store/wmc24b5samyhk334766kfb12blq8w2qn-jshon-20170302
  /nix/store/qskvnwysf9lf96phx3448b7qk2ii94aq-moreutils-0.70
  /nix/store/d29cz77xpm1i1v6pj3m4v7q1m76zrlc1-perl-5.42.0-env
  /nix/store/rgp36mcaz89jj3xcnhpi7br3p8x5k0bd-perl5.42.0-IO-Tty-1.20
  /nix/store/5kzb6hn0jlb1fia02x6r162q9c5wyi4y-perl5.42.0-IPC-Run-20231003.0
  /nix/store/n5zpx6b4acnldwdki386wzlv9i2f88g7-perl5.42.0-Time-Duration-1.21
  /nix/store/n31d3spsn2i1z4c9fwd9r5jjwsviiwff-tarsum
docker-layer-nix> Adding contents...
docker-layer-nix> Adding /nix/store/vzq56sf7dqndd26qi9am06pcynl23br8-base-system
docker-layer-nix> Packing layer...
docker-layer-nix> Finished building layer 'nix'
runtime-deps> structuredAttrs is enabled
docker-image-nix.tar.gz> Adding layer...
docker-image-nix.tar.gz> tar: Removing leading `/' from member names
docker-image-nix.tar.gz> Adding meta...
docker-image-nix.tar.gz> Cooking the image...
docker-image-nix.tar.gz> Finished.