these 21 derivations will be built:
  /nix/store/3lgyr5ncsk006clzakcri63qlgsvz26c-chain-1-root.drv
  /nix/store/779sirzknd16n49gwgkhlaxrs1wwnfyq-chain-1-link-1.drv
  /nix/store/sg3cg7k7drvvbrs9s7bykxm7l53s40zx-chain-1-link-2.drv
  /nix/store/pv75j654m0im20zd9w3zdhpvb12ac88b-chain-1-link-3.drv
  /nix/store/q3la754nijcsn9yv95rhjnx30f9v9d1c-chain-1-link-4.drv
  /nix/store/8nyrk8avbg8gfpnd9lcmd2cx9d6p9iiq-chain-1-link-5.drv
  /nix/store/y2w91c3a9rf1bfk8lizifyh9p44jf5k5-chain-1-link-6.drv
  /nix/store/3z27fg5kp5chxrm6mvjrxnx6099mz89c-chain-1-link-7.drv
  /nix/store/9j8hd0bwrlpbw01b4ikanvrpxiz9rj9y-chain-1-link-8.drv
  /nix/store/92azmmyh09fn3h32vv0qfsjpsqz8bqcp-chain-1-link-9.drv
  /nix/store/6b7xrdqxkyd9vcsjwq313bi00apbns0h-chain-1-link-10.drv
  /nix/store/bxnw9fkaqrmm3jib86i08a3fxivxwdim-chain-1-link-11.drv
  /nix/store/ja7z8zkpn99qszfrscv6xca8sc4rkrnv-chain-1-link-12.drv
  /nix/store/y6wdfwa2rxr1am7zvrrnmipzcwjdcnw6-chain-1-link-13.drv
  /nix/store/n0094hszvg3mm8c1hym6wrrdcyp9hhwk-chain-1-link-14.drv
  /nix/store/620ssza660fbagyywml64njn1q32gfgx-chain-1-link-15.drv
  /nix/store/c4rqibb1m5v55db9a87yygdq2ddzwkj5-chain-1-link-16.drv
  /nix/store/58v4snp7lrvirs591g8hz9cv3crj44xh-chain-1-link-17.drv
  /nix/store/h4358x0spccc4968wh3w6acg0ivxgvjh-chain-1-link-18.drv
  /nix/store/rvg3z1hgmqmgjx8chp6lfrnyy0wg0m7q-chain-1-link-19.drv
  /nix/store/7bq3w5y8pc8yc6rz8yr1nzfwr685a0wg-chain-1-link-20.drv