these 21 derivations will be built:
  /nix/store/hkks2z3r0bgmz42r5v0viak0rpix0rcc-chain-1-root.drv
  /nix/store/qk0srvdyjxff0pk66sib7la941spagz0-chain-1-link-1.drv
  /nix/store/9i1h6x6f41yjiks601f0wrxi4vk0wvix-chain-1-link-2.drv
  /nix/store/pjk4hqviv841cvvl9gxfrk9wfjwpvfxn-chain-1-link-3.drv
  /nix/store/k58fslfxr3vnpgb0spx3xicjhn3ka4yl-chain-1-link-4.drv
  /nix/store/l577ql95l4wii8yrfrmrq91p5r5zqv3x-chain-1-link-5.drv
  /nix/store/blax3kl7fxza1sj0a95izi1s8srlxw2r-chain-1-link-6.drv
  /nix/store/rfq6kdxzm3kfnakv5ynsgp0ikydky5as-chain-1-link-7.drv
  /nix/store/yr8n2k0mygziay69q8k5pn083sqd40bl-chain-1-link-8.drv
  /nix/store/fsfgqgnk5an1frqm8rgs95gkd30qya8c-chain-1-link-9.drv
  /nix/store/r1zjfyxlvxv8yqrlhcqcigrlhirpwyx9-chain-1-link-10.drv
  /nix/store/0vipj2zl00mkk4b2wasg517c5bh56w3n-chain-1-link-11.drv
  /nix/store/1c5jnzq81z6kvjab7csp59ipny85y4cy-chain-1-link-12.drv
  /nix/store/kiima5hfzrx78819czsz4amfph471h4n-chain-1-link-13.drv
  /nix/store/45ywz1kz2sb1cwra41gpcj5v5vaxvy15-chain-1-link-14.drv
  /nix/store/gih5s88br51p5h7jipa4v2ydxqksir29-chain-1-link-15.drv
  /nix/store/19nmz18b5bhljzxqhpfdwi2aj9knj24b-chain-1-link-16.drv
  /nix/store/1izv1zsdipw3i7i4iijaql4grhzsjxmy-chain-1-link-17.drv
  /nix/store/mbcp4flyn7b8mncp08d7ln1r2w89i95m-chain-1-link-18.drv
  /nix/store/qcc6jcd5j3ms572r1zs2zh40001vqqyx-chain-1-link-19.drv
  /nix/store/dh4gcsgv1lnhlqs4qb3s2wacsb1n08cb-chain-1-link-20.drv