these 3 derivations will be built:
  /nix/store/18fzblj4gxijph4cfq366c7xbccj5dyp-clan-cli-source.drv
  /nix/store/44gcpazznqfil4r7k1bm631h0m89p6pj-clan-cli.drv
  /nix/store/61a2mz02jdj13awci6bw0s8495wfi5g0-nix-shell.drv