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/fz1y1indxr169f0yrmxnd27322sfrrmj-tofu.drv
  /nix/store/mcyrnj4grlfg70agnjnaafr4v6gjv4cb-cache-new.drv