these 21 derivations will be built:
  /nix/store/z09v2mjwzyg5cphdbxb3rxx7c8b8gj11-chain-1-root.drv
  /nix/store/idl7wqlw9glhdqlf55g5b7cm7gy2xczm-chain-1-link-1.drv
  /nix/store/wf6iblc55ab9rq3g3p4g0vc7fdzhxn5w-chain-1-link-2.drv
  /nix/store/3f7pzqq6vdv4f5qa2gnp0m0vbwpbzd82-chain-1-link-3.drv
  /nix/store/vhrjjp2fdp19jy8q099rc503jm76h8xk-chain-1-link-4.drv
  /nix/store/4fr09zg1iwpffhiyx1m3vvqwh61dqr33-chain-1-link-5.drv
  /nix/store/ch9c9ppwh68hq7v6909jdq2199x58l9h-chain-1-link-6.drv
  /nix/store/sqiv29zcvg8z045yfpayl06pqx47lqnv-chain-1-link-7.drv
  /nix/store/k37kzq4y755q71rawnmmx583vwib0f3v-chain-1-link-8.drv
  /nix/store/45jqcm85c7kvx52nrsqshnwrjb0fjd14-chain-1-link-9.drv
  /nix/store/4mjwsw1drgvxdc5nkzxcl3yrpcw1xrm5-chain-1-link-10.drv
  /nix/store/nd14dc2gb5w10yhjwvdnp06xxarhkvsx-chain-1-link-11.drv
  /nix/store/8ndccgjlflk8iws9ky3xan5yir84nk4y-chain-1-link-12.drv
  /nix/store/0rsghhfjfdzjc4wybwak4gyfnspb704y-chain-1-link-13.drv
  /nix/store/xb06p5n60rkh3hmfq8yqlm38cfxmqsfn-chain-1-link-14.drv
  /nix/store/niz7nprkx8r2qynp2snny3p3g1xiiqrd-chain-1-link-15.drv
  /nix/store/d3vl66wq6q23m0v4b490g97k12gqhijp-chain-1-link-16.drv
  /nix/store/0ybfk8cj5s80agwiid7mh1v47gbhf25n-chain-1-link-17.drv
  /nix/store/kqwjssbv30dpvl4p37k6g2l36fkbpihd-chain-1-link-18.drv
  /nix/store/dbiq70xpg859ymbj3czdkbgszhzpc8xy-chain-1-link-19.drv
  /nix/store/6cfb2m98vkn9lc2p8jbhmj1r05wfzf63-chain-1-link-20.drv