these 21 derivations will be built:
  /nix/store/hv2nn74dc06fcy3wpdl8sf6f5yhqva1n-chain-1-root.drv
  /nix/store/vcfy38ksbjy6vfakxw307i3iv6wf9i5y-chain-1-link-1.drv
  /nix/store/nvvsh4414jzq0fikpjwlgfiqd1vzxj0c-chain-1-link-2.drv
  /nix/store/cx7vkiav6g1dmnh613v8c9h3sqvk7aaf-chain-1-link-3.drv
  /nix/store/2zkbpfa13pd7l2nm0hvjfwcck1hnyp42-chain-1-link-4.drv
  /nix/store/gprh88vk8y87hqnh4qmrlmh309s3w47y-chain-1-link-5.drv
  /nix/store/xclqy3dvw9mw0pxdaisnpa3rzdk15lf6-chain-1-link-6.drv
  /nix/store/bskdw06vqmim0mbf1d0kv8d13pfym9pd-chain-1-link-7.drv
  /nix/store/q4anh46zhp232bhc583hhi3jhnwrjjlf-chain-1-link-8.drv
  /nix/store/jf5nrr3sfmgy2aqrcy48rc9y1j1qldn0-chain-1-link-9.drv
  /nix/store/63a034irmfq09dhab370hclsi6llh0vx-chain-1-link-10.drv
  /nix/store/gq191bx5zvqkg2lfly954w2qxmy6chlw-chain-1-link-11.drv
  /nix/store/2q1phiaylgl0cybg7xal5b0n3qz9h65h-chain-1-link-12.drv
  /nix/store/lmh9qa5nq3kh17qxdqs0wlmqcksh1l1z-chain-1-link-13.drv
  /nix/store/br55qhlyvbxy5hi5yy8ap9p8k8zl6vkh-chain-1-link-14.drv
  /nix/store/nrqf3wqcfd8w9dr0gc5s7pn7k3pjaw8m-chain-1-link-15.drv
  /nix/store/bpfspb082gl8sd18hii2ksyf1bvzgvy6-chain-1-link-16.drv
  /nix/store/rk4sac9mgkmvysankfl8vbis50kd7vrc-chain-1-link-17.drv
  /nix/store/6809qngjydz65hl4kk6smvghpb1fr04q-chain-1-link-18.drv
  /nix/store/ravp7im55q7vcjbpbmp0n4ccgc2kspbx-chain-1-link-19.drv
  /nix/store/pczgrhsd2mccx8p6v68f49p7av1f59y5-chain-1-link-20.drv