these 21 derivations will be built:
  /nix/store/kzf3iv98rm1rrmw3si0cmrwifzmp39f3-chain-1-root.drv
  /nix/store/hjnxjyxfrlrg9jpki6c5nk88ybdgqdhn-chain-1-link-1.drv
  /nix/store/8hd6hz05b14221wgsg938v53ggjb15q8-chain-1-link-2.drv
  /nix/store/vipjdnggc0a1m8b5v3fgb42h62vqjgs9-chain-1-link-3.drv
  /nix/store/gd26iv4m4v49zwq47kx16avw5k2lnh3s-chain-1-link-4.drv
  /nix/store/61xnd676za0b62xbh5yx06g22z42kwv8-chain-1-link-5.drv
  /nix/store/b9jym2kv6y5s5qj2rw0g60cxmwkk8xh6-chain-1-link-6.drv
  /nix/store/7wrx2kbx3i5q6a1lpjzmnacfjipq30i8-chain-1-link-7.drv
  /nix/store/1p91swp7axf7pwq6phjzqcr1s42k6l0w-chain-1-link-8.drv
  /nix/store/6d7lgpdy0h9hrdz7phdzlhf30vvmjj2a-chain-1-link-9.drv
  /nix/store/mz7mz35yrhiaj0qx4xx106fm3k75dap6-chain-1-link-10.drv
  /nix/store/jy75k5f01wpwv4qgaffifnz2q5vj5bs0-chain-1-link-11.drv
  /nix/store/ba1xv94q73rqzjy1x3d31h6g0aiwws6w-chain-1-link-12.drv
  /nix/store/da9jk1xcm8if8yhzmx7d0sadclbfygks-chain-1-link-13.drv
  /nix/store/snfbc2imrmkyihf7aw0n7h25qw838inx-chain-1-link-14.drv
  /nix/store/fkjrjsnswaf00ikipq0xf8lb122kql71-chain-1-link-15.drv
  /nix/store/ck59c3nz6pjcn1kdlymbn6xq9w4v6c37-chain-1-link-16.drv
  /nix/store/fqps9gn2ia3c3jhapc3wlphh7adqgfmf-chain-1-link-17.drv
  /nix/store/m5snli8pq68nff6475yq504y7dyb773k-chain-1-link-18.drv
  /nix/store/jpbikm5wkkspxcxg30qd090p1fkrs0ly-chain-1-link-19.drv
  /nix/store/pxyv5y49ig54rp2qfk2139l6hygx3lrg-chain-1-link-20.drv