these 5 derivations will be built:
  /nix/store/7irpkvrkncbbg6yf8dr3svjrfrx3f33f-closure-info.drv
  /nix/store/vsipa3xd6afbg4sxn3v4qysgks5k5hsp-clan-runtime.drv
  /nix/store/822amx4b2scw6192cf06pw489b1ln4vp-clan-cli-source.drv
  /nix/store/8p1xrqm2r7rlhn4zhaw0k796d6imry35-clan-cli.drv
  /nix/store/4dnwq9j31hg0443ly4c4v2jl9w731jm2-check-vars.drv