these 21 derivations will be built:
  /nix/store/m378izaqsz1bmifyyxl5wbjgdkqyiwjx-chain-1-root.drv
  /nix/store/2cqb20ksdgbrahrhnb9mn35qr15hhcz1-chain-1-link-1.drv
  /nix/store/ly5jc94c27hy97g35k5aripv4h931pm6-chain-1-link-2.drv
  /nix/store/nmq6j53fag64blwi1zanaq83n37mrlva-chain-1-link-3.drv
  /nix/store/j0wb3b9pvrh8yj0nw96d9h1ppcxna743-chain-1-link-4.drv
  /nix/store/q7gs2rja3g58k0kilpxa7jhvyy3zccmb-chain-1-link-5.drv
  /nix/store/j7c1ndgf1wawyvp5rrhqq1rwxxar6jpg-chain-1-link-6.drv
  /nix/store/dn27990j4jgqqnbf05lkh5m7m9y0jp76-chain-1-link-7.drv
  /nix/store/nds5m5klxqja7s7lkpw76371dqrnd1z8-chain-1-link-8.drv
  /nix/store/qwjhsh3sakjwnk14zhpyw1cmjsk80rpg-chain-1-link-9.drv
  /nix/store/ldpdlrmalz2fx1ffinr4fmc1kibjkbgd-chain-1-link-10.drv
  /nix/store/2jpsyvz9far6hh0q2mfdyzijrn5pnab2-chain-1-link-11.drv
  /nix/store/4g221rd1w621hvbz943jkyqjdwzcc2fb-chain-1-link-12.drv
  /nix/store/yayrp9kipygqfhlf7rbya151ah5dc57m-chain-1-link-13.drv
  /nix/store/pjj4lpv4lscfigwbi6sw27pi2kv6x45c-chain-1-link-14.drv
  /nix/store/hkwd99c8j1bg1blab18j5vlm6bh5c9kz-chain-1-link-15.drv
  /nix/store/jjwdciv5gi54nn884xzrjr03pl2imlyw-chain-1-link-16.drv
  /nix/store/0jcgc73pkq5xv26rsqbg0lw304kfcf5m-chain-1-link-17.drv
  /nix/store/rpslxqix69spki77611nj59l10msbdis-chain-1-link-18.drv
  /nix/store/72q522s79wybgfs9l3w9j08psq4g1xdd-chain-1-link-19.drv
  /nix/store/20ns2mfm309vi229r9jyx2n0cyg4a4f4-chain-1-link-20.drv