these 21 derivations will be built:
  /nix/store/3xw2w7bhk6n4iyvx6hcb9ld18cicm66y-chain-1-root.drv
  /nix/store/zr4ryj5vs0nhi23dbd0ylada3g8v0jwx-chain-1-link-1.drv
  /nix/store/81g3gxfkdj899g42gwikhmgs1v247hd2-chain-1-link-2.drv
  /nix/store/3fi82r176dl4v13sgqrwpiqdppfw3v9h-chain-1-link-3.drv
  /nix/store/pwm7fp9a2ymk56rgiqh5fbbhyq6phaa5-chain-1-link-4.drv
  /nix/store/m19xbrppxyjxf9sxc4v4g2rqx9z4y4di-chain-1-link-5.drv
  /nix/store/j3mjpd1j64bvca82faspfawa84bwzafw-chain-1-link-6.drv
  /nix/store/d4lb3s3ifq8zrxn40918khh9qn5s6ibj-chain-1-link-7.drv
  /nix/store/3zya1kbk9lkskbdl37jlkjiq10nb1434-chain-1-link-8.drv
  /nix/store/vvjryjdbqrvlw92l1f9k0583d855skky-chain-1-link-9.drv
  /nix/store/z5mj63nxhq2masaqfrafblzra8s1ffy8-chain-1-link-10.drv
  /nix/store/vc9qrj358av83bwwi2s9q984gw27n0q7-chain-1-link-11.drv
  /nix/store/7w018s9jbfnfl7zihs9lgryvb53vg86q-chain-1-link-12.drv
  /nix/store/cyf6q02b4gq6sdaidprah4876gr2gphf-chain-1-link-13.drv
  /nix/store/nam5qgdiyq12h8pw8nw13ibgnlwga43v-chain-1-link-14.drv
  /nix/store/c34wjrykfi1pk3zpl6n2qmy1h663wd98-chain-1-link-15.drv
  /nix/store/da7gdjwh0p04g46manq00k9n5m7463lq-chain-1-link-16.drv
  /nix/store/ppf0ligb94vkx0vn2xmjpgjwkz5a53rd-chain-1-link-17.drv
  /nix/store/0mp2i291ag8azvlyfqmcrdydwgvmid42-chain-1-link-18.drv
  /nix/store/r0nsc6g9qr6zygj9flig9fh6qbk9a4cl-chain-1-link-19.drv
  /nix/store/d7xpw2sir90ysxbd2bnl7cbnwaw40bzf-chain-1-link-20.drv