these 21 derivations will be built:
  /nix/store/850xfgwd8n20kmnfvphdm9qcplgvcy1x-chain-1-root.drv
  /nix/store/q3c7nx8hqdldvlknws4lr63mds6zpi5h-chain-1-link-1.drv
  /nix/store/rm0g9qk165fsy7w0xbvbxv1ma7lxyiav-chain-1-link-2.drv
  /nix/store/rjl41b9f0mg8yf5d8pkkf9rybb45j8v2-chain-1-link-3.drv
  /nix/store/zpk3dyk5yygkqhfx2ivbplqwg0ag5bgs-chain-1-link-4.drv
  /nix/store/jqgzr5s0h6i096ph3p6891j0y7n3aaf1-chain-1-link-5.drv
  /nix/store/qn78gqqkc96p5xsms57f68ngbwd3yr31-chain-1-link-6.drv
  /nix/store/52spzf47nmd81pm0qz9w68g1bbzkffn3-chain-1-link-7.drv
  /nix/store/hggv417cnvbzlc04zh302j86famcximw-chain-1-link-8.drv
  /nix/store/rdbkpx7li7djc9av18wldaip4367cl25-chain-1-link-9.drv
  /nix/store/ywwmdn55a4yz2khjqyw84j1m2qmyr4yf-chain-1-link-10.drv
  /nix/store/r9rrdwvz983lmppvz2gn2kczh5isd8qb-chain-1-link-11.drv
  /nix/store/mzn1bmk0nicb58pk1lfsi2p6d7nyrg31-chain-1-link-12.drv
  /nix/store/ismg384qm66adwrj914bkmmcynbphqwq-chain-1-link-13.drv
  /nix/store/01jx1kqzggg5dx6hcj06vdnffypw1w1q-chain-1-link-14.drv
  /nix/store/pivqi95axac552lwqn0vx1zm84fmzrfj-chain-1-link-15.drv
  /nix/store/5zf4lrm4mr34shrhqswr6f47fd8z3mzj-chain-1-link-16.drv
  /nix/store/rgc95bs1lbimjrcdjdpyzrhrsmd9jgsx-chain-1-link-17.drv
  /nix/store/xpczqx5cksspmn1z4zc2nzx54h2yis6h-chain-1-link-18.drv
  /nix/store/j732fhk67vh5bvgkfg92znsmn8siiir0-chain-1-link-19.drv
  /nix/store/65ch6nv208ab96h99mrnahx85l1fs4fp-chain-1-link-20.drv