these 4 derivations will be built:
  /nix/store/dl4525hm87k1k4m7alw1qpwc2gw015kj-clan-runtime.drv
  /nix/store/ajrdbmnc3wjw6fycz15bprb07yj88knv-clan-cli-source.drv
  /nix/store/q2ha26ksl3a27fyiimw2fd4is73prcqa-clan-cli.drv
  /nix/store/6afchplq39js11790hxl3w8cf5n93qyv-nix-shell.drv