these 21 derivations will be built:
  /nix/store/04ak25micgnv0xz7nrm823ssb526vjab-chain-1-root.drv
  /nix/store/j8dhxx7r8h2hxys6aykx2drns4a48diy-chain-1-link-1.drv
  /nix/store/rkkz7bhxdsz5mmv42qa31vawp9cy8akp-chain-1-link-2.drv
  /nix/store/jpnx2l2r1yh2pkkm8yrsb1ajp6qn1359-chain-1-link-3.drv
  /nix/store/nyqq0q8rc8nh1i8j04lgdcrwiy5chyx7-chain-1-link-4.drv
  /nix/store/cplfpcycpqm9spipwymvfpna1f86x320-chain-1-link-5.drv
  /nix/store/4fpxmcqxppggxwvnsx8yd3rgk4ljbhw5-chain-1-link-6.drv
  /nix/store/7skxw2fj1qjfs9wg918gbwdqckpf4q21-chain-1-link-7.drv
  /nix/store/jq9qwfm3pzc95il17ncb1y66xmlpxrwy-chain-1-link-8.drv
  /nix/store/jr4d3vid1gq8dvx68isqd7mfika2xd9a-chain-1-link-9.drv
  /nix/store/ggxf9lsvsp1ak7almhh4snw66glvg1wa-chain-1-link-10.drv
  /nix/store/2rpgpgmsjncpzdmdfbi59fkasqvibssd-chain-1-link-11.drv
  /nix/store/70bpjlzka8sfyvbx8mdbmp5zwpa792w1-chain-1-link-12.drv
  /nix/store/xbvlwl6fzbcn3djwpnyq76czaq25srzi-chain-1-link-13.drv
  /nix/store/sfdiixrvlmb0ar2fi17a5dybx2y0rpxz-chain-1-link-14.drv
  /nix/store/nfxdz6xxcq3i6ckns6hwvlfpbia5xwsl-chain-1-link-15.drv
  /nix/store/klgym6qy7b2knqwmikyh66iq1a9bv4x1-chain-1-link-16.drv
  /nix/store/ws1qsnarinvggnhkvnrxi2hq645ys9fi-chain-1-link-17.drv
  /nix/store/mn8fhlnhbwih40f2iz75f45g36d7xgpi-chain-1-link-18.drv
  /nix/store/zrdzh338ah2xgh7cv0g4k4dh7ih2gp7s-chain-1-link-19.drv
  /nix/store/vl52rh0x205rwfffnlpab7d6k2awbw2k-chain-1-link-20.drv