these 4 derivations will be built:
  /nix/store/x1bifp4ik7s32j8c14v2qz5haw7pcvm2-clan-cli-source.drv
  /nix/store/j531s522nz67ar7ipn5z2l3qy4yfbm8b-clan-cli.drv
  /nix/store/mg0rfr95qvkbh0x6wc3y01k2566nyn34-closure-info.drv
  /nix/store/l6r9v9q7rw3x9bq02nrc5722ciym34yi-check-vars.drv