these 21 derivations will be built:
  /nix/store/710jpr9bdxpl87z9i7xaa3fvbaci2fc1-chain-1-root.drv
  /nix/store/z9yz1y3ysl6j9sj9wann4xdws5da22xl-chain-1-link-1.drv
  /nix/store/qyj9jcz0rjba7cv3vc9mipl3s9242scc-chain-1-link-2.drv
  /nix/store/67m9h7shz08j5dylfsvsvd4b6gbrwl0m-chain-1-link-3.drv
  /nix/store/2zwx4d95vqw3xkm1zjd0484q42hbqhp9-chain-1-link-4.drv
  /nix/store/znjr4ih5qxfcr00dlvl4g49f0p0hlh82-chain-1-link-5.drv
  /nix/store/7rb1adfz2isij6xacil2pvzja1a2x4xx-chain-1-link-6.drv
  /nix/store/s3gmch17472xpx2w1vm826swcqix9pwh-chain-1-link-7.drv
  /nix/store/z0k39dhp9wgk433s87v35zac9vmba8mv-chain-1-link-8.drv
  /nix/store/9bmr68s9vhla72284z5qq93jl4095nz3-chain-1-link-9.drv
  /nix/store/zsrmm71zsp94xii3ihhpgbzflsxvba0c-chain-1-link-10.drv
  /nix/store/dqfhhl2pwjs6i4bw5fm4gbd73s3y2cv4-chain-1-link-11.drv
  /nix/store/hpbn1b3zv5b1fnvxvfig0gbg62n70aw1-chain-1-link-12.drv
  /nix/store/66095l46rhdzwj3iz2hw9d7p5hz8yb7n-chain-1-link-13.drv
  /nix/store/31mjlmdxdc2zka9aphnrw4rhrsj4j7nh-chain-1-link-14.drv
  /nix/store/bgrx8v5dkn2kqd6cb07nlw4mxgddsp36-chain-1-link-15.drv
  /nix/store/kdhaf7fmq0f4f0rccsj3pjwzna8w4mcv-chain-1-link-16.drv
  /nix/store/44mqsnipymaqy5gi35ccqsq0hs2kf84z-chain-1-link-17.drv
  /nix/store/qsr7vywji8wd9gd28zjzb7j440kmxrxb-chain-1-link-18.drv
  /nix/store/5y7bwhdqkbz9bf77aqjwi3a91hy6ykkd-chain-1-link-19.drv
  /nix/store/nz4gvfk220clq79zlasvdsy66kp7p2px-chain-1-link-20.drv