these 21 derivations will be built:
  /nix/store/493kzbi9ln3hlfzzjqy91rdqm0ymgpdv-chain-1-root.drv
  /nix/store/vzv4hq35nqw464vvj4q4025b1rl6s27f-chain-1-link-1.drv
  /nix/store/1rs34nyi5a9cd5ivd7jcwqx6v1qcla61-chain-1-link-2.drv
  /nix/store/c90r5msrbjrylnpjps0ah3v59ginailx-chain-1-link-3.drv
  /nix/store/hw3axv7nsvrsgyfimgyivc4wncvcrsy6-chain-1-link-4.drv
  /nix/store/mnym3a586i0chgyk9ggh1s3q3j5aybby-chain-1-link-5.drv
  /nix/store/rzri3ds20154cgc0dgb3vzvsd61fz4bd-chain-1-link-6.drv
  /nix/store/qmcl9gp89g4vr9jq50j1fplixa63yv9z-chain-1-link-7.drv
  /nix/store/vfc44gi4rhgnnakrxzswxn1jbg1v6d65-chain-1-link-8.drv
  /nix/store/j8f26xhn2h13amcm9pkbxdf458hp2195-chain-1-link-9.drv
  /nix/store/b7yg1pwhy90rq11zr9n9aazna2bkyw8k-chain-1-link-10.drv
  /nix/store/34k49w9ay8cprqjb01l1mg91mj7zljag-chain-1-link-11.drv
  /nix/store/8y08hygnpgmjc707140nhd85bbvrhyxx-chain-1-link-12.drv
  /nix/store/x5ki3mancgfszxl7qjv0xnbrckmv1cni-chain-1-link-13.drv
  /nix/store/m1jfsg3zclnmfrn2xwz8g525694j4drf-chain-1-link-14.drv
  /nix/store/0vsqni9zzlmmjf3yc8kspw4xhq3g3100-chain-1-link-15.drv
  /nix/store/ng4927jjb046284rhn88zrd0k74cc60j-chain-1-link-16.drv
  /nix/store/xylw8chk5l321bbbn76r03f8b8v6gbs0-chain-1-link-17.drv
  /nix/store/fnjpv6152gj7b7mngchzfz5n774ylm8c-chain-1-link-18.drv
  /nix/store/yc6cgkp4j3501j44w5p1qqylxnib04sz-chain-1-link-19.drv
  /nix/store/1jls2fzvwfvbx2nq3rcqzxqnilnbk419-chain-1-link-20.drv