these 21 derivations will be built:
  /nix/store/adf9wbihxmk0z6nq3phr75822fygsnhz-chain-1-root.drv
  /nix/store/kb9ajcjw8mdxjsrm5r9ckqbh32f0vav7-chain-1-link-1.drv
  /nix/store/5n9601f46mc8w3xk8pdi095r3083lfkf-chain-1-link-2.drv
  /nix/store/l4hshnbdjlrnghlidh923dfhrjd1n97i-chain-1-link-3.drv
  /nix/store/vp39hgvz6gy6sijmgjcw6p7mdi53x6j5-chain-1-link-4.drv
  /nix/store/yl2pkzspakdjlqb9y5zha31zy12igf1h-chain-1-link-5.drv
  /nix/store/9p64lkzdi4c29z1ix48knc20drjwaka7-chain-1-link-6.drv
  /nix/store/kjqmjkadb800jq8krj3pnmwjf9hg4i6q-chain-1-link-7.drv
  /nix/store/nyggp6kwnpqimvhqy8wqd3jl2qgvy35r-chain-1-link-8.drv
  /nix/store/6rk52wnmynmhr9mhgyw3q6pcwxj2ys3y-chain-1-link-9.drv
  /nix/store/6fpvzi91p6q7pqcrnn00x4ikjji9b01h-chain-1-link-10.drv
  /nix/store/fi0484171ipnp6bqc0x6rwcr8bq58jcz-chain-1-link-11.drv
  /nix/store/v76amd7qcs6nd1sz504hb5qbjdxmpc5z-chain-1-link-12.drv
  /nix/store/kzdbz6vczrabrvxvi64sw6nz6isbjid2-chain-1-link-13.drv
  /nix/store/44ifx7s2gm6qzz0h8qpwcv4g3c240qpd-chain-1-link-14.drv
  /nix/store/6vsjcnxk56yc1f4js1h681qbiv23407p-chain-1-link-15.drv
  /nix/store/zj3j1biz6psbjxkcl7g9gpc6ffc3982i-chain-1-link-16.drv
  /nix/store/4z5k59nylgx1gd4nycq9vw5iv6zjbgrz-chain-1-link-17.drv
  /nix/store/p8ya4zpcfmrfsli6ln1sn6bfjnlw6xv7-chain-1-link-18.drv
  /nix/store/aspgkx6mvnph05bq3flvj1ds6d3s442y-chain-1-link-19.drv
  /nix/store/1v0naa8280isfxx6wp4gbjkqzfhasmyf-chain-1-link-20.drv