these 21 derivations will be built:
  /nix/store/djbj932k3dw2wj497jxhf0l6j66rv74b-chain-1-root.drv
  /nix/store/1aixm2vc3ss2m2xghwl0ln4q0lrcn5qb-chain-1-link-1.drv
  /nix/store/d6w8ndghqx82cf5s7jgw1p176n0nqcaa-chain-1-link-2.drv
  /nix/store/xl176c3mgckjkf5d81k8axyi45wr7zqa-chain-1-link-3.drv
  /nix/store/z24bi02k2f6hxvcbdpj575b5g8hwb9pv-chain-1-link-4.drv
  /nix/store/xnnismvnjgb6awn7a0hc8nxxc4jaswgs-chain-1-link-5.drv
  /nix/store/3gmvr9lfjcgr75x05c5bcmhh7mfwalsk-chain-1-link-6.drv
  /nix/store/mmw8yxm9v0lskfs62sanmyw1rq2c0jvc-chain-1-link-7.drv
  /nix/store/k9w2a18a53n5zzfn79llz370b1yhjl3s-chain-1-link-8.drv
  /nix/store/4fwijy0a8nrig22rsiv5vcl6ml2br5vc-chain-1-link-9.drv
  /nix/store/0lw2i8hbvij8z718rbskhar7x5f5banr-chain-1-link-10.drv
  /nix/store/l7zbhsy0xrbw1ridd1d98zmngd0qwzww-chain-1-link-11.drv
  /nix/store/bklnwvkncyyih71pw865lrzm4j1344wk-chain-1-link-12.drv
  /nix/store/52s2pm67kw7d3yszwa006xfpq981gf5k-chain-1-link-13.drv
  /nix/store/31nmj583wri4n8hsi1x6gkxw5zyxzl6h-chain-1-link-14.drv
  /nix/store/66gjqaw6xq3k12maqrns0m66gsia23fm-chain-1-link-15.drv
  /nix/store/bjjnkp1n7n15b7q7ipf85lb01civchm4-chain-1-link-16.drv
  /nix/store/cacvb0vjfnwnr787zllgbkcq25sy32xj-chain-1-link-17.drv
  /nix/store/b77rsmjslcmazqgzl77ws4qaw1ygxvc6-chain-1-link-18.drv
  /nix/store/splmxaabkjk617rcyywi9jnn08jmwg1y-chain-1-link-19.drv
  /nix/store/a0sbjwfar3xw1mka068v503vw29fmcw1-chain-1-link-20.drv