these 21 derivations will be built:
  /nix/store/hpfrz0r92bplc3s8w0h1sfmcf5ygp4g8-chain-1-root.drv
  /nix/store/6wapmzln5hk9phgfrz71d8y0zw4pj73b-chain-1-link-1.drv
  /nix/store/bg36h1fag803nm8mpyc1rzwn9n4cw4jn-chain-1-link-2.drv
  /nix/store/cjw22rhzawgvnsziv8sq88h1msxv9hrw-chain-1-link-3.drv
  /nix/store/yn13a2j0klwaidgg48sfij41zchxwk1h-chain-1-link-4.drv
  /nix/store/dhs4crlkmiqbmw1bzkfbm8l5sdcxnhak-chain-1-link-5.drv
  /nix/store/242rcnc1az44lr8k2qg9k01xrn7z1mlk-chain-1-link-6.drv
  /nix/store/2yazgbn1zaiaq280q84bary5nwybn6mv-chain-1-link-7.drv
  /nix/store/ym33bdf1fjlbz84rnadw8j7856zk8ing-chain-1-link-8.drv
  /nix/store/gk2pniyv2sghm7zmfhfz2l51vhlhvi7l-chain-1-link-9.drv
  /nix/store/98glvszbqp1ncbyg0lkmh7z0x4qqn9zf-chain-1-link-10.drv
  /nix/store/kwrblp5i8shddwx0dw81h3mfaad42y9b-chain-1-link-11.drv
  /nix/store/pi628zknqhp0chxc1nknh0rz8phpafj9-chain-1-link-12.drv
  /nix/store/fidf8k4jx2h3jc222i3zxarbadl6ml6d-chain-1-link-13.drv
  /nix/store/hn0yp9zpylrjhr62ihybw7n2dy12996c-chain-1-link-14.drv
  /nix/store/qn8mkz38m4mkpcxqz3pal6xlkyc1mbjy-chain-1-link-15.drv
  /nix/store/xcvfsxhxh6w69y9l3jz0537gy8hdgbji-chain-1-link-16.drv
  /nix/store/6fzbmfi2s2nkk2qyafcsbgb1jmvq9pws-chain-1-link-17.drv
  /nix/store/j596b40028k5i2pdglr6lvwl3hsrd0j7-chain-1-link-18.drv
  /nix/store/4slnvpk2xa402hx2rcfwll71cmswb10f-chain-1-link-19.drv
  /nix/store/njfvj9g313qyb4wzqh5jjdfi5hylak5m-chain-1-link-20.drv