these 21 derivations will be built:
  /nix/store/86j9hdi6qdxndfbhwgyg0vy0d7q5aggc-chain-1-root.drv
  /nix/store/1b1z9d04xp7g307qbynlfhxljk9j1llr-chain-1-link-1.drv
  /nix/store/ihvxx79j9jpb0zwvxdkx8a56fcrmyv07-chain-1-link-2.drv
  /nix/store/1nqrs8hs73mgi7azkbib48f64xq974rk-chain-1-link-3.drv
  /nix/store/mw5r5p0gyh1fq6cgnwhn70b0rc38jzki-chain-1-link-4.drv
  /nix/store/maqfjjj6sk0b2sj9v5adi1mdyq8a15bm-chain-1-link-5.drv
  /nix/store/nm1jga6y9qs8sbrlm0qr85d1v7d6i156-chain-1-link-6.drv
  /nix/store/3aw2z3s7giza82s2d4h1mf5zp5z3l65z-chain-1-link-7.drv
  /nix/store/6za6i0h9y3d2mgg9a3gdgkaf2wf2ksxf-chain-1-link-8.drv
  /nix/store/sgz8934r77466sdf9arhpy15j546kh8a-chain-1-link-9.drv
  /nix/store/c07n942sdnfr0fknn3jsx9b0brbgj5rk-chain-1-link-10.drv
  /nix/store/gcvpyasb2acgyslzavh1cbvadw0wkkig-chain-1-link-11.drv
  /nix/store/ns3fmy2ak0cwrwnjdrhcpwayrg0i10g3-chain-1-link-12.drv
  /nix/store/2j78n890w2nv82h9midw65c1xrqbk9c1-chain-1-link-13.drv
  /nix/store/jhszfr1clr4ip7dq1m4znjjqd62907b1-chain-1-link-14.drv
  /nix/store/732r51xln8gkvmixpz4n75njqjgcvqzz-chain-1-link-15.drv
  /nix/store/05xh27rmzz3dgldn1pjigz1zmpjd5mf0-chain-1-link-16.drv
  /nix/store/06hfgbgi2y58pd33p9wj5yrs4z4j56is-chain-1-link-17.drv
  /nix/store/s1bhqp5klxcm9m5m194bbb4gd0n0b6iz-chain-1-link-18.drv
  /nix/store/nkl5msc32qznc32mpl922q2ylfbfqwam-chain-1-link-19.drv
  /nix/store/dhvw7k0pvqrjwgbpyijgr3d3clv64b7d-chain-1-link-20.drv