these 21 derivations will be built:
  /nix/store/79ylp5lwblci4lfnw0gqnsgmldwrhx1r-chain-1-root.drv
  /nix/store/y9f4jdzxkqjnbqc5fvs5rlfh318ay3jy-chain-1-link-1.drv
  /nix/store/rv7xxy2rc8k8j1c3n5hmkslkyvhxqvpb-chain-1-link-2.drv
  /nix/store/xjr87r1m2bm741bx953cbl07qimg9ykm-chain-1-link-3.drv
  /nix/store/ic1wh5lhrm1klpbdi43h52bj81iisns2-chain-1-link-4.drv
  /nix/store/8qi8ha5q6hfv23d4mwzs3xnkqbdcqn8b-chain-1-link-5.drv
  /nix/store/bs84acn68hq2hckh6qzzv1kmdy3dch5p-chain-1-link-6.drv
  /nix/store/icv67nz9a408560nxh9qvmhh533gh5ra-chain-1-link-7.drv
  /nix/store/2mkfwqs0clvmg2bk3vxaiy62yv6v37yk-chain-1-link-8.drv
  /nix/store/kwwaplqa99xiy9fx7hjb1bwfl6k5d7qg-chain-1-link-9.drv
  /nix/store/qv5684g6nb2m5jcxmn4hzyiqs7scmij0-chain-1-link-10.drv
  /nix/store/brrwjh491d6jbzl00pmnvki3b1hqvfnc-chain-1-link-11.drv
  /nix/store/hcpf7fgnxjqx5dq55q56wr0sy60xw2ia-chain-1-link-12.drv
  /nix/store/pkir2rhyhvqfc82280mvsxafrrc9dr4s-chain-1-link-13.drv
  /nix/store/vms2b9qwkw7482x5gj9s0lwcgdjlya25-chain-1-link-14.drv
  /nix/store/cr2qixpjhxm6ra26wdm11wyyfi197j0f-chain-1-link-15.drv
  /nix/store/8c6nh2rmakf3zkxd409f8mbmz9raldjf-chain-1-link-16.drv
  /nix/store/x67kr7nvc3lw4h1nhlshxqcvnrc9yiw9-chain-1-link-17.drv
  /nix/store/i1jhjac0ip80d0857756viv69y8v8akd-chain-1-link-18.drv
  /nix/store/z5l0zgh85i5b8zb4yjysi24x8zzxw0fv-chain-1-link-19.drv
  /nix/store/in55f8h53w6kjbb88858i3nii0dwi9pl-chain-1-link-20.drv