these 21 derivations will be built:
  /nix/store/dg9b0ps8m228r1k3mmnxk60jldvh34i4-chain-1-root.drv
  /nix/store/jkwrfvj5jx8ak7d4jqacdl7pz2rw7piq-chain-1-link-1.drv
  /nix/store/2l90mvff6i5w48v74k17q2371flwnavf-chain-1-link-2.drv
  /nix/store/40bc7w2nv09n7fm4rb8iip55r36y4607-chain-1-link-3.drv
  /nix/store/xf2dx08f0c1b39hx6kyxj6mnvlvbn4db-chain-1-link-4.drv
  /nix/store/2sxrh8ym6fx6c95saym426nd257nz3s5-chain-1-link-5.drv
  /nix/store/4wmvjkcjc5xfz6dw2jcz7bj76k1ayig0-chain-1-link-6.drv
  /nix/store/4qcywdrw51s3w6833rz2h5v37bsvzbbm-chain-1-link-7.drv
  /nix/store/hngmnsb7g860j96929v65ayj883hq518-chain-1-link-8.drv
  /nix/store/2zggi3cj53zd2xr1830hcdv3ckixz1q2-chain-1-link-9.drv
  /nix/store/winnkfyc7131ig4zbm3r00hchy8r7dk9-chain-1-link-10.drv
  /nix/store/l2lsvk8l9cyda0v590q8b64y3xyjy523-chain-1-link-11.drv
  /nix/store/8rb6yn78c9q5gmjqv1rgfy9yi4vbsjdz-chain-1-link-12.drv
  /nix/store/pk0ml7jxycqn8w4cfkbwdapxq7fbgpfb-chain-1-link-13.drv
  /nix/store/zz8zy40qff9vrb3g0my4558jfrd5zj3n-chain-1-link-14.drv
  /nix/store/7zd3dd1dblma2icv8s0k1ibh46bia51d-chain-1-link-15.drv
  /nix/store/8mhk9mzhdzvrj1fmz83ylfiy7fq3n797-chain-1-link-16.drv
  /nix/store/0nypdfljawi4ggvmq125q5x1ybmzpy87-chain-1-link-17.drv
  /nix/store/hcpws0c1z5zn4xylmkr6cxqr9713qzg1-chain-1-link-18.drv
  /nix/store/4ws4h3b4dwq1gxpjpm1hwi2gfyjb8sj6-chain-1-link-19.drv
  /nix/store/59nda2pqmbj62vbg8g27jkjvljp9xlgv-chain-1-link-20.drv