these 21 derivations will be built:
  /nix/store/42rdbsv6ls16w1s8dw4w183m1n757nh6-chain-1-root.drv
  /nix/store/dmqyrf8s0d73k6xclv8kn943c2prbhwj-chain-1-link-1.drv
  /nix/store/9bahxlaz1pxamw832vwfnrb190lspsc3-chain-1-link-2.drv
  /nix/store/lapgh4a4f9x9h3z4hl5ksj0ml24ra3b6-chain-1-link-3.drv
  /nix/store/9l7nwfav8vp3mn936db27cl5ajhml4rx-chain-1-link-4.drv
  /nix/store/dzbwkd0lsh7rsidzzkyhwv6x5yad3kw5-chain-1-link-5.drv
  /nix/store/7f8n33rf4xyjwqda24yffpbglzhrbik4-chain-1-link-6.drv
  /nix/store/4frnzw0gi12nfsnpbv5yvxjadl25nc4k-chain-1-link-7.drv
  /nix/store/3v39w97v1ins1g33wh88pgsyqzmmx3j1-chain-1-link-8.drv
  /nix/store/lan63afn1iyapbbnxh599l80inq346cj-chain-1-link-9.drv
  /nix/store/cqm4yqxzb2r3pd4lha3dwr3hd8bairqf-chain-1-link-10.drv
  /nix/store/knjzlwihmsfj21crjpvwsydl05yy7yjx-chain-1-link-11.drv
  /nix/store/pyw8wbpc91p8dci2mx9mbjdi59yglpvj-chain-1-link-12.drv
  /nix/store/wgjy1i9asyszlq60rkvbssa95hjs922j-chain-1-link-13.drv
  /nix/store/niaqxc33yilf4xj4gm2yn2vnary7j657-chain-1-link-14.drv
  /nix/store/0yfs6m2n03zfficwi6c76wfr2wq8z7d9-chain-1-link-15.drv
  /nix/store/d5qva0b4500m39kh6ayk3n4x4f2akg82-chain-1-link-16.drv
  /nix/store/sjgwphg8l1i5i0gvsq2ya2z3d5aysj85-chain-1-link-17.drv
  /nix/store/w3wh177iz1llpvc7wm79y3kbbqz1c8wj-chain-1-link-18.drv
  /nix/store/fvzviiilsfbw8cs5c5kjimfjd2br3faf-chain-1-link-19.drv
  /nix/store/ck47lbgx236zcfzsscgpwcw12gq83qms-chain-1-link-20.drv