these 5 derivations will be built:
  /nix/store/c1c2b80r0chwc4kw90iislqb0hz017g6-clan-runtime.drv
  /nix/store/567cjba1j1bvxyikynh8bxx5d1i1c60f-clan-cli-source.drv
  /nix/store/4w5arw95k238qccmmn9bni248zq298zf-clan-cli.drv
  /nix/store/afbd2p59f5b6hbq6bqgakm8js0ij59pl-closure-info.drv
  /nix/store/nc3a4n045xi5g6wg1vxv1w3ymvaxpbz2-check-vars.drv