these 21 derivations will be built:
  /nix/store/bd0xmqn46aj2s8vmqaqp8mzgp8bfc6g2-chain-1-root.drv
  /nix/store/g9wancl7kmgqh4h9z8q6bcsd6nh7fcya-chain-1-link-1.drv
  /nix/store/dd9qnx7xkzbm76wrc8flpa6c1nygw55y-chain-1-link-2.drv
  /nix/store/1wappmy9qr09j8k5nqnvnm0lv5bjsr52-chain-1-link-3.drv
  /nix/store/7d3ah7vslyc86z7pn831pfzykyzbx2fz-chain-1-link-4.drv
  /nix/store/ysa8sasmpqv8hj8q8cqkmhcy265nh7vm-chain-1-link-5.drv
  /nix/store/sxn19yjdy4d82ynnfrg6i8165aw541bd-chain-1-link-6.drv
  /nix/store/llbb0xznalg11p5j5cfp6r2160la4p5h-chain-1-link-7.drv
  /nix/store/sg24jc7676546jnyqvfkk1qwikqxym79-chain-1-link-8.drv
  /nix/store/l1gf9w8lr717bb7rvwg7ym4ljgphv9zk-chain-1-link-9.drv
  /nix/store/174kc7hjan61qzc5wmzhs9hn97cq30p2-chain-1-link-10.drv
  /nix/store/z8gjkhd5f7rfmz6chhhmrk8dik4xk6if-chain-1-link-11.drv
  /nix/store/yz184qcqnvidxx6vm2gw4ibi1ymwlpxv-chain-1-link-12.drv
  /nix/store/cids74xiyc26qfvyr9frrsdyrhk9vjvc-chain-1-link-13.drv
  /nix/store/l0vr92fpzysn4dl4asw26q0ajg4kbidf-chain-1-link-14.drv
  /nix/store/hzavbwr4n83r2hhcgx7g51i3iqa4jdh0-chain-1-link-15.drv
  /nix/store/kzkgn3pvcyh9shyn7j888qx6ixg23lf7-chain-1-link-16.drv
  /nix/store/cccg90f3zwsnjzr6ra2yqa4cnakn9s4v-chain-1-link-17.drv
  /nix/store/3vfs6lwk140g43yvrycijbjgbdxalfwn-chain-1-link-18.drv
  /nix/store/3fmvn6557yp9gcfdvi6c0gs7yqj8mm45-chain-1-link-19.drv
  /nix/store/vp0mbm42j2kc04hp909yrycj9syw4sqk-chain-1-link-20.drv